These 50 binding rings are made of high-quality plastic, offering durability and flexibility. The double buckle design ensures secure and easy binding for loose leaf books, cards, and other materials. Available in multiple sizes: 15mm, 20mm, 28mm, and 40mm inner diameter, and offered in a variety of colors including pink, red, yellow, green, blue, and multicolor. These binder rings help keep your documents and crafts organized and easily accessible. Features: 1. Made of high-quality plastic, providing flexibility and high toughness, resistant to breakage and built to last. 2. Practical tool for organizing loose sheets, ideal for binding cards, notebooks, and loose-leaf documents. 3. Inner diameter options: 15mm, 20mm, 28mm, and 40mm. Double buckle design enhances strength, making it easy to fasten and secure. 4. Suitable for use with loose-leaf books, notebooks, scrapbooking, key rings, and other organizational needs. 5. Package includes: 50 x Loose Leaf Rings. Color options: Pink, Red, Yellow, Green, Blue, Multicolor. Specifications: Material: Plastic Color: Pink, Red, Yellow, Green, Blue, Multicolor Size: Inner Diameter: 15mm, 20mm, 28mm, 40mm Weight: 25g, 37g, 64g, 125g (varies by size) Package Included: 50 x DIY Binder Ring