The top 10 steeps and tricks to evaluate your manufacturers:
Here you can check my advice about hiring your next supplier and vendors that I learnt from running or managing several businesses:
1 Ask your manufactures about their focus and expertise
2 Learn about the warranty
3 Check their Return Policies
4 Understand their shipping guidelines
5 Read between lines their payment method
6 Double check if your product have technical specifications
7 Request for digital Instructions and manuals in advance
8 Verify their background online such as legal actions againts your vemdor
9 Verify if your company has transparency on pricing
10 Learn Who is who on your industry
The list of top US verified Industrial manufacturers
http://www.1.superindustrialonline.com
US 200 Best ranked Machinery and Equipment leasing vendors
10 Top Leaders in Packaging
http://www.edanaro.com/lease-now
Key Packaging Suppliers at glance http://gustherpack.com
Verified Contract Packaging http://baspac.com