10 pcs - 51MM Black Plastic Binding Comb (Binding Up To 500 Sheets) -10pcs / Pack

- Binding Capacity : Up To 500 Sheets ( A4 70gsm)

- Color : Black (the most commonly used color) - Length : A4 (21 Rings, Approximate 11-3/4″) - Shape : Oval - 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