1. 100pcs/box 2. 15 boxs/carton 3. many colors: red/ green/ blue/ black/ white/yellow 4. size from 6mm to 51mm 5. 21 loops

1. 100pcs/box2. many colors: red / green / blue / black / white / yellow 3. size from  6mm to 51mm4.  A4 long

5. for book binding

binding machine

  

paper cover

pvc transparent cover

Plastic comb ring binding rings book binding rings