You may couple this units in several ways. In this diagrams a rectangle of 1:3 is used to create a garland. Other constellations are possible too, as shown in the diagrams at the end.
1
2
3
4
6 5
7
Normal unit
8
Stop unit (mind flaps)
Flap
9
Put flaps in pockets of other unit to couple two units.
10 Couple 4 units like this
11 Bend units as shown to lock firmly
12 Couple units to this two by two to make a garland. Use stop unit at the ends.
13 This network consists of two kinds of rings: 6 unit rings and 2 unit rings.
14 Crystal of 4 unit rings in three dimensions