Features Durable ABS Material: High-quality ABS plastic material ensures durability and strength, allowing for easy paper compilation and long-term use under normal conditions. Colorful and Glossy Finish: Boasts a vibrant and glossy exterior with strong adhesion, wear resistance, rust corrosion resistance, and aging resistance, ensuring long-lasting and reusable binding coils. Convenient Portability: Compact and lightweight design makes it easy to carry with you at all times, without taking up much space when stored. Versatile Binding Method: Can be manually or instrumentally bound, making it beginner-friendly and suitable for a variety of users in office, academic, or personal settings. Wide Applicability: Suitable for use in any office, by students, or individuals, offering an easy and convenient binding solution for anyone with related needs. Specification: Item Type: Spiral Binding Coils Material: ABS Inner Diameter: Approx. 11mm / 0.43in Application: Stationery accessories binding supplies Package List: 20 x Spiral Binding Coils Package List 20 x Spiral Binding Coils