1、For Your Paper: Designed to have 16mm inner diameter, the spiral binding coil enables smoother page turning for reading and writing. 2、Better Binding: Easy to open and close, you can also cut the binding comb into your preferred length for your needs of paper storage. 3、Large Capacity: Able to clip a large amount of sheets up to 130pcs, the binding spine suits for office, classroom, library and so on. 4、Great Material: Made of premium plastic material with pretty colour, not easy to deform and very durable with corrosion and long use. 5、10Pcs in Total: There are 10pcs spiral binding coil in the set, and the large quantity will simplify the replacement of damaged ones. 10 x Spiral Binding Coil Item Type: Spiral Binding CoilInner Diameter: Approx. 16mm / 0.63inHole Number: 30 HolesCapacity Reference: 130 Sheets