English: Item Type: Spiral Binding Coil Inner Diameter: Approx. 29mm/1.14in Type: Stationery Accessory Binding Consumables 1. For Your Paper: Designed to have an inner diameter of 29mm, the spiral binding coil allows for smoother page turning for reading and writing. 2. Better Binding: Easy to install and remove, you can also cut the binding comb into your preferred length for your storage needs. 3. Large Capacity: Capable of holding a large number of sheets, the binding spine perfectly fits in office, classroom, library, etc. 4. Great Material: Made of premium plastic material with pretty color, not easy to deform and very durable with corrosion and long time use. 5. 10 Pieces in Total: There are 10 spiral binding coils in the set, and the large quantity will simplify replacing damaged ones.