My factory supply  binding material(plastic comb binding, double wire loop, plastic spiral coils)
They are used for binding machines.
1/  plastic comb binding
Colors Available: Black, White, Yellow, Clear, Blue, Red, Green
Rings Available:19,20,21
11/4"(6mm)
5/16"(8mm)
3/8"(10mm)
7/16"11mm)
1/2"(12mm)
9/16"(14mm)
5/8"(16mm)
11/16"(18mm)
3/4"(19mm)
13/16"(20mm)
7/8"(22mm)
1"(25mm)
1-1/8"(28mm)
1-1/4"(32mm)
1-3/8"(35mm)
1-1/2"(38mm)
1-3/4"(45mm)
2"(51mm)
If you are interested in my products, you may visit my web.