Features Durable and Long-Lasting: These plastic binding coils are built to be durable and sturdy, ensuring that your documents are securely bound and stored for extended periods without damage. Convenient Manual Binding: Easily bind your documents by punching suitable holes, a simple and efficient binding method suitable for offices, students, and individuals alike. Smooth and Durable: These binding coils offer good gloss, strong adhesion, wear resistance, rust resistance, and smooth page turning, ensuring they don't break, fade, or age easily, providing a long-lasting solution for your binding needs. 19mm Inner Diameter: With a 19mm inner diameter, these binding consumables are perfect for students and teachers, providing a suitable and efficient solution for your binding needs. Total of 20 Pieces: This package contains 20 binding coils, providing you with a convenient and ample supply for replacements and continuous use. 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