Product Design and Service Design Portfolio in 30 pages

About Me +86 17822011900 daniel0623@tju.edu.cn English & Mandarin

Employment

Activities 2021 MIT City Science Summit (virtual) I discussed and generated a range of ideas on issues such as urban-rural planning strategies with other city science lab members through TJ-MIT CSL-SH invitation access.

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02

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A series of stress toys

A small house hold sterilizer

Community waste reuse plan

Product Design Graduation project 2020.11-2021.06

Product Design Coures assignment 2020.03-2020.05

Service Design Course assignment 2020.05-2020.10

Tetrapods

cleaner-o

Com-Compost

07/2021-01/2022 School of Mechanical Engineering, Tianjin University, Tianjin, China Research Assistant-Industrial Design

Research 07/2021-01/2022 Research Group Leader

Education

White Paper Research on Current Status of Industrial Design in Pharmaceutical Industry (CR Sanjiu-Tianjin University project)

09/2017-07/2021 School of Mechanical Engineering, Tianjin University, Tianjin, China BEng-Industrial Design

07/2021-01/2022 Research Group Leader Electric Bicycle User Experience Research (Xinri-Tianjin University project)

Honor & Prize 2021

‘Excellent graduation project for undergraduates of Tianjin University’

2020

1st Prize of ‘National College Students Industrial Design Competition, Tianjin division’

2019

2nd Prize of ‘Tianjin Industry and Art Design Competition’

2019

2nd Prize of ‘China Renewable Energy Society College Students' Excellent Scientific and Technological Works Competition’

2019

2nd Prize of ‘Tianjin University Social Practice and Science and Technology Competition on Energy Conservation and Emission Reduction’

2021 UNNC Youth Researcher Leadership Summit I conducted research with other three members on green materials and co-wrote the final report. Our report won the third place in this summint.

2021 Machine’s Gaze Workshop In this workshop, I participated in three stages of fictional, object-centered ideation, and led the group to finish the report for the first stage.

2018 That Hill Growth Camp I visited each subsidized family in Mianyang city during the 15-day practice as the practice team leader of TJU and summarized the home visit report pertinently.

2018 TEDxTJU As a new member of TEDxTJU, I successfully completed all the conference work on site on the day of the activity.

2016 TEDxYinzhouSeniorSchool As the head of the selection committee, I had invited all the speakers of this event. And I successfully presided over the whole activity.

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Background

Tetrapods

The frequency of reading mental health related information

66.99% Rest 66.40%

A series of stress toys Product Design

‘2021 Excellent graduation project for undergraduates of Tianjin University’

Ways for people to deal with mental health problems Self adjustment (top 4)

58.75%

Chat with a friend

47.12%

Leisure activities

Only 0.73% of the respondents paid no attention to mental health.

Eat something

Professional resource support (top 4)

66.99%

Find information online

INTRO COVID-19 has prompted the psychological pressure problem a common phenomenon. People need to find some ways to get rid of it in the pressure environment. Playing toys is a way to decompress, but the mechanism and mode of decompression need to be defined and redesigned.

The top 10 mental health topics people pay attention to

66.40% Read books on psychology

23.13%

Go to the hospital

In October 2020, 2153 people committed suicide in Japan, which even exceeded the number of deaths caused by the epidemic.

83%

The female suicide rate in that month increased by 83% over the same period last year.

Anxiety Meaninglessness Aimlessness Depression

The design methods and rules of decompression toys being studied and verified, a decompression toy is to be designed for young groups through empathic ways.

Chart: Top 4 psychological problems brought by study or work

Empathic Research Strategies Pre survey The first five psychological distress are more emotional related problems, and the last five are more related to relationship.

Individual Project

3

28.15%

Find a psychologist

2153

Target User: college students

GOAL

2020.11 - 2021.06

Facts in Japan

Undergraduate

Interview

Probes

Generative symposium

Time: Goal: Participants: About 30 days total Obtain specific elements for design Students close to researcher There are two generative symposiums. The first one aims to generate some ideas about the final product, and the second one is about verifying the prototype.

Data source: anonymous questionnaire on public mental health awareness jointly sponsored by Simple Psychology and Nutshell, sample size n = 11031 Chart source: Simple Psychology 2020 public mental health insight Report

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generative research Pre Survey

Semi Structured Interview (two out of ten respondents) Job: Student

Age: 19-22

This persona is only used for probes.

Fake Target User

Name

Coping strategy

Stress toys are...

Liang

I would like to lie in bed, playing with my cell phone, and go out for a walk. Lying in bed is the most helpful way, because I can get rid of stress caused by studying.

Less social attributes

Name

Coping strategy

Stress toys are...

Toys I would like to buy

Yihe

I might eat, read novels or some essays, sleep, and also deal directly with stressors. Some activities make me happy, while others make me feel meaningful.

I think some stress toys may have the same effect as cats, which are fluffy, soft, silent companions and reward people for their efforts.

I might buy a stuffed toy, like Teddy Bear.

Beautiful things make me feel happy. I won't buy barbie dolls. It would be too childish.

I feel pressure because of course study and of job searching. And the more pressure I feel, the less willingness I have to face it.

Probes Stress Card Record all your stories and objects related to stress.

The time, place, environment and weather of the story.

How does something trigger your stress? What actions do you want to take?

Finally, what is your response (including emotional and behavioral)? Why? What is the actual result? What do you think of the final result?

What specific and subtle emotions did you generate throughout the story?

Has your attention being shifted? What do you think of the change?

Positive Emotion Card Record all your stories and objects related to positive emotion.

The time, place, environment and weather of the story.

How does something trigger your positive emotions?

Did you seek it or did you encounter it?

Is your emotional change related to your previous experience?

What exactly are your emotions in the whole story?

What do you think of the role of these emotional changes in your life?

Camera Record: Record everything in your life.

A2

A3 A4

B3:

Work & living space

I think toys work better when the toys stay alone, and they should be reassuring.

Slightly recognizable Different styles

Work & living space

Categorize Existing Stress Toys

B1 B2

B3 C1

C2 C3

Picture: I bought 10 kinds of stress toys on the market for users to experience

Best sound & appearance

Toys I would like to buy

High-quality craft

Products For Test

A1

Experience Report

A3:

Best in playing

Common Interactions

Emotional

Destructive behavior, such as pulling.

Behavioral

Splicing, installation, etc.

Cognitive

Finger flicking, palm grasping/pan moving, etc

Chart: A summary of all the stress relief toys on the shopping website Taobao

Best weight

Color

Weight (g)

Material

Interaction

Style

Other factors

A1

74.5

plastic

spin

cheap looking

a little noisy

A2

97.8

metal

spin

high-quality

really quiet

A3

86.0

metal & plastic

spin

cheap looking

good feeling when play it

A4

94.4

metal

spin

a little puzzling

really quiet

B1

134.0

metal

flip

boring

nice sound

B2

62.5

plastic

flip

light

too light and too small

B3

155.7

metal

flip

shining

nice sound and is cold

C1

110.3

plastic

multi

boring

not sure how to use

C2

100.2

plastic

multi

cheap looking

bad surface

C3

98.9

plastic

multi

fashionable

bad sound

Chart: Different characteristics of the toys tested

Type

A2:

Name

B type:

Best shopping option

You need to answer these questions. You can also fill out your answers with emojis.

Which product do you use most often? When is it usually used?

What functions do these products have? How do you implement these features?

Is the experience of using the product what you expect? What is your desired outcome/experience?

From a visual perspective, which product fits into the workspace better? Which one doesn't?

From a tactile point of view, which product bothers you? Which product gives you pleasure? Why? What else influences your perception of the product? How do they all work?

Which product is sitting on your desk? Has it made a difference in your daily life and behavior?

Given the choice of one product to clear from your desktop, which one would you choose?

The products experience report includes not only some superficial perception questions, but also questions that can only be answered by user who have deep experience. The users are required to use each product over a period of time.

Products experience report is an alternative method of empathic design for the questionnaire survey.

Picture: The result of probes (generated by target users)

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generative symposium 1

Sketch

Participant Selection Based on the results of previous user interviews, probes and product experience report, four senior undergraduates were selected to participate in the generative symposium. The purpose of the first symposium was to define the form of stress toys.

Name

Gender

Research area

Type

Ruihong

Male

Industrial design

Host

Yonghao

Male

Visual art and design

Expert user

Yihe

Female

Internal combustion engine

Ordinary user

Haiyun

Female

Chinese literature

Ordinary user

Mingya

Female

Interaction design

Expert user

Chart: An overview of symposium participants

Picture: Before the symposium (photographed by Geng Ruihong)

Mood Board: balanced and unbalanced

Introduction Discussion 1 What are the downsides of current toys?

If you were to add a toy or a ornament to your desktop, what qualities would it have?

What makes a good toy?

If a toy needs to be operated by yourself, what qualities should it have?

Define: What are the qualities of a good toy on the table?

Discussion 2

Waves and stress can both be thought of as a state of imbalance. So tetrapods have some characteristics in common with stress toys.

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What are the better alternatives? What should it look like?

What are the disadvantages and advantages of the current scheme?

Summary: What other actions can be taken to define and optimize the current solution?

The workshop was held on May 8, 2020 and was divided into two sessions, each lasting 1.5 hours.

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Prototype

generative symposium 1

Clay Model

Participant Selection

Assembly & Painting

Suggetions

The second symposium focused on evaluation and discussion of existing prototypes.

The participants of the second generative symposium are all fourth-year industrial design undergraduates. The participants and the host discussed and evaluated the prototype from visual, tactile and auditory perspectives.

Name

Gender

Type

Ruihong

Male

Host

Yonghao

Male

Expert user

Shuixin

Male

Expert user

Jingyue

Female

Expert user

Mingya

Female

Expert user

Defects in one-handed operation Altough the elongated shape makes it easier for fingers to slip through the gaps between the rotating bodies, and therefore easier to grip with one hand.

But the elongated shape is less spaceefficient, reducing the volume of the flat rotating body to make it easier to operate with one hand.

Longer rotation The current prototype rotates with a lot of vibration, so the rotation time is not very long compared to similar fidget spinner. The persistent rotation may have something to do with the craft.

Chart: An overview of symposium participants

Picture: Before the symposium (photographed by Geng Ruihong)

Theoretical Support: the role of stress toys in GAS. Users can divert their attention and then relieve their emotional stress during the operation.

B1

S1

B2

Operation The M-series prototype, shown at left, uses six opposite rubidium magnets to hold each other in place. The prototype S-series, by contrast, uses an open deep groove ball shaft fixed with an end cap.

The diagram below shows four possible prototypes, S for one-handed operation and B for both hands. Among them, type B1 operation mode can only be applied to the M series prototype.

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The painting process was carried out outdoors with a mask, glasses and gloves.

S2

Stress toys serve as an avenue or aid to psychological and physical therapy to help users return to the original state.

Introduction Discussion Which product do you think you use most?

Do you think the experience of using the product is what you expect?

Users shift their attention while playing, and also change their cognitive assessment of stressors and trigger positive emotions to offset the negative emotions.

M Series Graph: General Adaptation Syndrome [GAS], identified by Han Selye

Can you think of any scenes or objects from watching and manipulating the current prototype?

Can you think of scenes, objects and stories when talking about your peaceful state of yourself?

Define

Which product is more likely to make you want to use for fun and relaxation?

What can be improved in the styling?

Which product is more likely to make you want to use in an anxious, stressed state? Why?

What should the product look like in touch and color?

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Test

Photography

Quantitative Test Experimental objective Test the effect of operating the prototype on the stress level of the subjects (psychological significance). By comparing the time consumption of the experimental group and the control group, the influence of the stress toy on the stress state can be obtained.

Control group While the researcher was delivering 32 questions of 2-digit additional and subtraction to all the subjects, they were required to calculate the number as quick as possible and try to keep the accuracy at the same time.

Experimental group While the researcher was delivering 32 questions of 2-digit additional and subtraction to all the subjects, they were required to calculate the number while playing the prototype with the normal rate.

600 500

Picture: Experiments in progress

The impact of operating prototypes on computing

Rate of Chage 50 40

400

30 20

300

10 0 -10

200

1

3

5

7

9 11 13 15 17 19 21 23 25 27 29

-100 Control group

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2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

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25

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27

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29

30

-20

100 0

1

Experimental group

Rate of change

Results analysis Since mindfulness is also a stressful state, it makes sense that the control group would take slightly less time than the experimental group. Out of the 30 sample results, only one sample showed that the control group took longer time than the experimental group, which might be caused by the subjects being too nervous.

Although the time spent by different subjects fluctuated greatly, the change rate was relatively constant at about 20%, with an average change rate of 19.25%. This means that operating the prototype reduced stress levels, but only up to a point. This slight effect is also one of the expectations of stress toys, toys with too much fun may have a negative effect on the user's daily life.

Picture: M series and S series prototypes photographed in the studio (photographed by Geng Ruihong)

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Scenario

02

define Market Research

Cleaner-o

Quick

Flexible placement

A small household sterilizer Product Design

Prompt

Stable Market

Sterilizers can also be hung on walls to save space, but not all Spaces have vertical planes to use.

Not everyone is interested in disinfection, so the sterilizer must have some prompt functions, such as voice prompt or sound and light prompt.

INTRO The COVID-19 pandemic has made ever yone pay attention to hygiene in our daily lives. Disinfecting small household items, such as watches and headphones, has become a new requirement for many spaces.

Design opportunities

Control of ozone Disinfectors are designed to disinfect objects that are difficult to clean, so high temperatures and ultraviolet light are reasonable.

GOAL

Portable

Fixed

Grey as the main color.

In order to adapt to the desktop space, the color of the sterilizer is best gray, and there are some eye-catching colors as an ornament to remind users to use.

Design a sanitary and suitable for everyone to operate disinfection machine.

Small size Individual Project 2020.03 - 2020.05

Undergraduate

Desktop space is often limited, so sterilizers should be as compact as possible to reduce volume.

Slow By studying the scenario we can identify some design elements of the sterilizer.

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The products come from taobao shopping website, where different types of products are summarized in a comprehensive order.

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define

analysis

UVC Disinfection

Mood Board

concept Placement strategy

**Facade**

+

=

+

=

+

=

+

=

+

=

+

=

+

=

+

=

Structures

Frequency

Picture: How ultraviolet disinfection works (source: Stanley Electric website)

Advantages of ultraviolet disinfection

01 02 03

15

Serious product homogenization.

There is no need to wipe and clean the area after use as is the case with chemicals.

It may cause health problems to humans and living things (acute and chronic ultraviolet radiation induced damage).

02

Some UVC lamps generate ozone. Ozone inhalation can be irritating to the airway.

03

Places in shadow or where light does not reach cannot be disinfected using this method.

Information is integrated on the U.S. Food and Drug Administration website and Stanley Electric's website

• Reduce the size of existing products as much as possible.

• Try to avoid the common "square box" appearance.

This method does not create bacteria that is resistant to ultraviolet disinfection.

01

O

• Enterprises can produce small and efficient disinfection machine.

Ultraviolet is also effective against microorganisms that are resistant to chlorine, when chlorine disinfection does not work.

Risks of UVC

Required Structure

SWOT Analysis

• Enrich product functions.

S

W The production line is not mature.

UVC disinfection technology is mature.

• Keep focus on competitive products and ensure the innovation of our sterilizers.

• Make detailed positioning of target users and scenarios.

• Ensure that the product meets the needs of the target users.

• Emerging technologies during the pandemic may be better suited for disinfecting machines.

T

Fierce market competition.

1

Exhaust fans and vents

2

UVC lamp bead

3

The lithium battery

4

Charging mouth

5

Stents

6

Confined space

7

A small UVC transmitter

8

Interactive panel

**Plane**

Eliminate possible ozone in time.

Emit ultraviolet light to disinfect.

In this way, the sterilizer can be used in space with limited power supply.

**Board**

Charge the battery or support the sterilizer.

This allows the object to be exposed to a larger area of uvc light.

Prevent ultraviolet radiation from causing harm to human body.

**Grid plate**

It can be placed inside the sterilized item to disinfect the inner wall.

Users can operate on the panel and check the working status.

Plane is the most common space in the desktop environment. Compared with products hung on the wall, objects on the plane have better mobility.

Cube can be well placed in various types of spaces.

Although square shape is ideal, considering the influence of homogenization, simple square shape also needs to be avoided.

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users Persona (During pandemic)

Sketch for Hardware Ideation User goals Experience goals

User tasks

• Can easily operate the disinfection machine, a "high-tech" product.

• Disinfect daily carryings.

• Store small sterilizer.

• Tidy up the desk.

End goals • Stay away from viruses.

• Save time.

Daily Routine The picture shows the disinfection work Jiaqi will need when she gets home. Using a small sterilizer to disinfect small objects such as mobile phones is the last and most important joint on a daily basis.

Door

001 Back to home

Preference

Life goals • Enjoy a clean, uncluttered life and keep family members and friends healthy.

• Clean feel.

• Pure color.

• Simple function.

The shoes also need to be disinfected 003 Pull the chair

Name: Jiaqi Age: 22 Gender: Female

Desk, a typical scenario

Profession: Student

**Grid plate**

Status: Primary user

Window

Desk: Pretty clean

Prepare items that need to be disinfected

Daily Carrying: Glasses, mask, cellphone, watch, earphones

004 Use the sterilizer on the desk

Activities in front of desk: Reading and using laptop

002 Disinfect clothes with alcohol

Need to take off the clothes and hang them on the wall

**Facade** **Hair band**

“

I would like to simply disinfect my everyday carryings, but some are too cumbersome to disinfect with alcohol.

“

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Window

Start the sterilizer and remove the item after disinfection

Closet

**A power outlet** **Mask**

Window

Bed

**Plane** 18

ineraction Control Panel

Function Realization User flow

Time

Structure Electrified connection

Control panel

Ventilation system

Cover

Baffle

Connected by plastic snap

Touch panel

Sieve

Direction of air flow

LED array

Exhaust fan

Key component

Group

PCB

Status

Bottom of cover Ozone detection chip Gold plated contacts

Rubidium magnet

Disinfection bin

Display area Size: 80*60mm

Display color: White

Time area: 80*40mm Function: • Show disinfection progress bar.

• Show the remaining time of disinfection.

• Set the working time of the sterilizer.

Interaction: by finger touch.

Upper part Glass cover UVC beads Portable UVC emitter.

Status area: 80*15mm Function: Show the working status.

Language: 简体中文

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Sieve

UVC beads Lithium battery Gold plated contacts

Segmentation

Sterilized air

Air inlet

Lithium battery Bottom

Air

Drying can only play an auxiliary role in disinfection, and the heater has safety risks, so the heating component is not shown in the drawing.

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exploded view

prototype

The shape of the sterilizer comes from race cars and ships.

Gold plated contacts UVC lights The mobile transmitter has three rings of UVC light to provide adequate illumination.

rendering

The method of addition finally distinguishes the shape of the sterilizer from the common heavy cube appearance.

The battery is charged by contacts.

Lithium battery The battery is placed inside the mobile transmitter.

Container The inside of the container is coated with teflon.

Rb magnet The inside of the container is coated with teflon.

UVC beads

Control panel The panel contains LED lamp beads, PCB and other parts.

Exhaust fan

Each UVC bead is placed in a concentrating groove to provide greater intensity of exposure.

Handle Ecofriendly rubber

Snap Fix the exhaust fan to the panel.

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Baffle

Ecofriendly PP

The scale of the clay model is 1:1.

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Background

02

The relationship between the residents lacks stability

Kitchen waste and fallen leaves are not effectively recycled

Com-compost Community waste reuse plan Service Design

1st Prize of ‘2020 National College Students Industrial Design Competition, Tianjin division’

Plants that are maintained in the community often use inorganic fertilizers, and the falling leaves, treated as a kind of garbage, are totally burned. This kind of waste disposal method of mass incineration or landfill is difficult to improve from the upstream industry in a short time.

Problems and Solutions: through sticky notes.

INTRO A large amount of garbage is produced in urban communities every day. It is not only produced, but also needs to be sorted, transported and disposed of. In these processes, many resources are consumed and wasted, making it difficult for resources to flow effectively within the community.

Children lack opportunities for playing with others.

To create a way of life that makes use of residents' free time resources and reduces the waste of human and material resources in the recycling process.

The leaves inside the community need to be cleared.

Not all games and competitions are suitable for children.

Children's role in garbage sorting can be really limited.

Old people who live alone find it difficult to fit in community.

Interface Design: group work Other part: individual work

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Undergraduate

Families are more likely to play with their own family members.

A lot of garbage is produced in the community.

Reduce the burden of garbage disposal in the community and promote communication among children by designing games and small competitions to get children interested in collecting leaves and sorting household and kitchen waste.

GOAL

2020.05 - 2020.10

The change of population structure not only changes the existing living and social pattern of urban community residents, but also exerts a subtle influence on the psychological state of urban population.

Parents have less free time.

The number of plants is not enough in communities.

Residens can plant vegetables in family units, with parents doing most of hard work, while the elderly can provide guidance. The elderly can also perform maintenance work such as watering.

Not all families have a lot of free time, and keeping everyone motivated can be a challenge.

Community plants maintenance.

Elderly people from different families can take care of community plants by working together to maintain the functions and services of community.

The health status of the elderly varies greatly in different ages, and not all the elderly have the ability to take care of plants

Neighborhood committees are usually reluctant to get involved in the organization of activities.

Low waste utilization.

There is a need to introduce new products and systems to help reuse resources within the community.

Composting of fallen leaves and kitchen waste is a good way to reduce the cost of community sanitation.

After the compostable material is collected, it needs to go through a second screening and treatment to produce the material for composting.

The brown cards represent pain points related to the environment, while the green cards are more interpersonal traits. New concerns and issues may arise in addressing these environmental and human-computer relationship issues, and these emerging issues are presented with white letters.

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ecology map

Service Blueprint

Possibility Residents' strong social needs The expansion of cities and the strengthening of community population mobility have restricted the communication of residents.

Residents need a way to socialize offline, such as having parties, collaborative community services, salons, and so on.

Sustainable communities Due to China's carbon peaking and carbon emission reduction goals, communities also need to save energy and reduce emissions. Obviously, community managers need to fully mobilize the power of residents.

Distributive solutions The distributed solution within the community should be based on the grouping and division of labor.

Different groups support each other to achieve a common goal of energy conservation and emission reduction.

From garbage to compost material A lot of organic waste is produced within the community every day. In addition to centralized incineration or landfill treatment, the waste can also be used as compost materials. And the composting process can be dealt with the residents themselves.

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persona

System map

Interface Main Function

Goals:

Jianguo Age: 65 Male Widowed Job: Cook (retired) Hobby: Jogging

• • • •

Get help with physically tasks.

To keep fit.

Start a new relationship.

Find friends at his age.

Register Online

Grouping

Grouping Users can post new grouping requests or join other published invatations. Different teams have different responsibilities, which include watering, fertilizing and collecting compost materials. Administrators can also specify groups in order to increase the success rate of grouping.

Pain points: • His own plants have a low survival rate.

• Make friends in the community.

• There is no suitable place in the community to grow his own plants.

Recording

Assign Tasks

Interact with other residents Users within the community compare their contributions to each other through ranking list. There is a similar competition between different communities. Users speak freely, either to share pictures or to comment on the work of others.

Trim

Goals:

Yifan Age: 40 Female Married Job: Engineer Hobby: Yoga

Register Offline

• Participate in more community activities such as barbecue party.

• Have more opportunities to play with her own children.

Sharing Check composting plan Users can check the completion of their work and the corresponding plan on the app. Then the users make plans for the next phase. Users who have spare time can also sign up to help other users with their composting and planting.

Pain points: • Long term high-pressure work makes it difficult for her to balance work and family.

• Not much exercise during these days leads to her poor physical quality.

Collect Materials

Goals:

Zihao Age: 14 Male Single Job: Student Hobbies: Soccer

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• Attend some social activities during holidays.

• Hang out with friends.

• Make friends in the community.

Pain points: • Meaningless entertainments such as video games occupy a lot of free time.

• There is always a feeling of idleness after finishing the course work.

Fertilize Ranking Irrigation Expert Guidance

Compost

Reward

The waste from the distributed plants will be recycled again through the "compost collection" process.

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sketch

exploded view

hardware

Size

Flowerbox handle Aluminum alloy tube

Flowerbox High density PP

Delivery hose Environmentally friendly rubber

Compost Box The compost box consists of two parts: the upper part is for flower box for planting green plants, and the lower part is for placing compost materials. Two hoses with peristaltic pumps are arranged at the bottom of the box to make it easier for the liquid fertilizer produced at the bottom to be transported to the upper part and to prevent composting failure due to liquid fertilizer.

Fixed frame at the waist High density PP

Back package board Biodegradable plastics (PP)

Liquid fertilizer filter

Front package board Biodegradable plastics (PP)

Biodegradable plastics (PP)

Liquid fertilizer storage area Peristaltic pumps were installed

Compost part handle Aluminum alloy tube

Base High density PP

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PP materials are widely used because of their lightness and stability.

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