Features Smooth Page Turning: The 16mm inner diameter of the spiral binding coil ensures easy and seamless page turning, enhancing the reading and writing experience. Customizable Binding: Easily open and close the binding comb and trim it to your desired length, providing flexibility for your paper storage needs. High Capacity: Capable of holding up to 130 sheets, this binding spine is ideal for use in offices, classrooms, and libraries, offering ample storage for your documents. Durable Material: Crafted from premium plastic material, the binding coil is resistant to deformation, corrosion, and offers long-lasting durability, ensuring reliable use. Value Pack: With 10 spiral binding coils included in the set, you have an ample supply for replacing damaged coils, providing convenience and cost-effectiveness. Specification: Item Type: Spiral Binding Coil Inner Diameter: Approx. 16mm / 0.63in Hole Number: 30 Holes Capacity Reference: 130 Sheets Package List: 10 x Spiral Binding Coil Package List 10 x Spiral Binding Coil