... avaliable 21rings,84rings and other Notebook for PVC Plastic Binding Ring CombApplication:It is suitable for professional books, ... documents, all of your presentations, proposals, reports, manuals binding.Material: PVCSize: 6mm,8mm,10mm,12mm,14mm,16mm,18mm, ... etc.Variety: 19 rings, 21 rings, 38rings, 42rings, 76rings, 84rings, etc.Regular specification for 21 Rings Plastic Binding Comb: SizeInchPcs/ ...