Features Durable and Sturdy: These plastic spiral binding coils are designed for long-lasting use, providing durability and sturdiness to easily compile and store papers for extended periods. Convenient Binding: Easily manually bind your papers by punching suitable holes, making it a simple and convenient process for offices, students, and individuals. High-Quality Material: With good gloss, strong adhesion, and wear resistance, these binding spirals offer smooth page turning and are not easy to break or fade, ensuring long-lasting use. 19mm Inner Diameter: Suitable for students and teachers, these stationery accessories have a 19mm inner diameter, making them ideal for various binding needs. Total of 20pcs: Each package contains a total of 20 binding spirals, providing convenience and ensuring you have enough for replacements and continued 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