Features For Your Paper: Designed to have 30 holes, the A4 spiral binding coil enables smoother page turning for easier reading and writing. Better Binding: Simple manual opening and closing, you can also remove the coil to adjust to the preferred length for paper storage. Large Capacity: Able to clip a large amount of sheets up to 100pcs, the binding spine suits for office, classroom, library and so on. Great Material: Using premium plastic material with transparent colour, not easy to deform, very durable with corrosion and long uses. 10Pcs in Total: There are 10pcs spiral binding coil in the set, and the large quantity will simplify the replacement of damaged ones. Specification: Item Type: Spiral Binding Coil Product Material: ABS Product Colour: Transparent Package List:10 x Spiral Binding Coil Package List 10 x Spiral Binding Coil