... -stamped onto spines of rings silkscreen printed Black Plastic PVC Binding Comb Factory Specification ApplicationIt is suitable for professional books, ... 16mm,18mm,20mm,22mm,25mm,28mm,32mm,38mm,45mm,51mmColorClear, black, white, red, blue, yellow, green, etc.Variety19 ... , 76rings, 84rings, etc.Regular specification for 21 Rings Plastic Binding Comb: SizeInchPcs/BoxPcs/CartonCBM/CartonG.W/CartonN.W/ ...