Feature 1For Your Paper: Designed to have 16mm inner diameter, the spiral binding coil enables smoother page turning for reading and writing. 2Better Binding: Easy to open and close, you can also cut the binding comb into your preferred length for your needs of paper storage. 3Large Capacity: Able to clip a large amount of sheets up to 130pcs, the binding spine suits for office, classroom, library and so on. 4Great Material: Made of premium plastic material with pretty colour, not easy to deform and very durable with corrosion and long use. 510Pcs in Total: There are 10pcs spiral binding coil in the set, and the large quantity will simplify the replacement of damaged ones.SpecificationItem Type: Spiral Binding CoilInner Diameter: Approx. 16mm / 0.63inHole Number: 30 HolesCapacity Reference: 130 Sheets .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List10 x Spiral Binding Coil