paper ring binder, document folder Material: cardboard Ring type: 2, 3, 4 or 23 rings Suitable for collecting the documents paper ring binder, document folderMaterial: cardboardThickness: 0.2mmRing type: 2, 3, 4 or 23 ringsSize: A4Color: up to customer's requeSuitable for collecting the documents etc.Packing: as below paper ring binder