Accessories | Plastic Binding Combs 21 Ring (A4 Size) Product Description 21 Ring Binding Combs for Professional PresentationsSuitable for A4 size documents21-ring plastic binding combsStandard Colours : BlackOther Colours : White, Red, Blue and Clear. Specifications Spine WidthsBinding Capacity (70gsm Wood Free) 6mm (Round)20 sheets 8mm (Round)40 sheets 10mm (Round)70 sheets 11mm (Round)80 sheets 12mm (Round)90 sheets 14mm (Round)120 sheets 16mm (Round)140 sheets 18mm (Round)160 sheets 20mm (Round)180 sheets 22mm (Round)200 sheets 25mm (Round)240 sheets 28mm (Round)270 sheets 32mm (Oval)300 sheets 38mm (Oval)360 sheets 45mm (Oval)420 sheets 51mm (Oval)500 sheets Get Quote Other Products Thermal Binding Machine Comb Binding Machine Wire Binding Machine Binding Accessories