Welcome to our store! 1. For Your Paper: Designed with an inner diameter of 31mm, 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 to your desired length for your storage needs. 3. Large Capacity: Can bind a large quantity of sheets, the binding spine is perfect for offices, classrooms, libraries, and so on. 4. Great Material: Made of premium plastic material with a beautiful color, not easy to deform, and very durable with corrosion resistance and long-term use. 5. 10 pcs in Total: There are 10 pcs of spiral binding coils in the set, and the large quantity will simplify the replacement of damaged ones. Item Type: Spiral Binding Coil Inner Diameter: Approx. 31 mm / 1.22 inches Type: Paper accessories binding consumables. 10 x Spiral Binding Coils Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.