Color : Black
Length : A4 (21 Rings, Approximate 11-3/4″)
High Quality plastic with glossy finish
Made of rigid PVC plastic
Will not scratch, chip, peel, or discolor
Fit any standard 21 ring comb binding machines
Can be slightly cut to fit the shorter 19 ring binding machine
Work perfect for cookbooks, reports, proposals, calendars, paper, and other companies documents

Shape in Round
6mm (100pcs/box), sheet capacity: 10~20 sheets
8mm (100pcs/box), sheet capacity: 25~40 sheets
10mm (100pcs/box), sheet capacity: 45~60 sheets
11mm (100pcs/box), sheet capacity: 50~70 sheets
12mm (100pcs/box), sheet capacity: 75~80 sheets
14mm (100pcs/box), sheet capacity: 95~100 sheets
16mm (100pcs/box), sheet capacity: 115~120 sheets
18mm (100pcs/box), sheet capacity: 125~140 sheets
20mm (100pcs/box), sheet capacity: 145~160 sheets
22mm (50pcs/box), sheet capacity: 165~180 sheets
25mm (50pcs/box), sheet capacity: 185~190 sheets
28mm (50pcsc/box), sheet capacity: 195~220 sheets

Shape in Ovol
32mm (50pcs/box), sheet capacity: 225~230 sheets
35mm (50pcs/box), sheet capacity: 235~240 sheets
38mm (50pcs/box), sheet capacity: 245~350 sheets
45mm (50pcs/box), sheet capacity: 370~400 sheets
51mm (50pcs/box), sheet capacity: 400~450 sheets