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 5 6 7 Normal unit 8 Stop unit (mind flaps) Flap Pocket 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 . 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. Other constellations are possible too, as shown in the diagrams at the end. 1 2 3 4 5 6 7 Normal unit 8 Stop unit (mind flaps) Flap Pocket 9 Put flaps in