Features Durable and Long-Lasting: These plastic spiral binding coils are durable and sturdy, providing long-term paper compilation and storage, ensuring your documents remain intact over time. Convenient Manual Binding: Easily manually bind documents by punching suitable holes, making it a simple and accessible process for offices, students, and individuals alike. High-Quality Material: The spirals possess good gloss, strong adhesion, wear resistance, and smooth page turning, ensuring they do not break, fade, or rust, while being reusable for extended use. 19mm Inner Diameter: With an inner diameter of 19mm, these stationery accessories are suitable for students and teachers, providing a versatile binding solution for various needs. Generous Quantity: This package contains a total of 20 plastic binding spirals, ensuring you have an ample supply for replacements and use, offering great convenience. Specification: Item Type: Plastic Spiral Binding Coils Inner Diameter: Approx. 19mm / 0.75in Type: Stationery accessories binding consumables Package List: 20 x Plastic Spiral Binding Coils Package List 20 x Plastic Spiral Binding Coils