These 50 pcs binding rings are made of high-quality plastic, durable and flexible. The double buckle design allows for easy and secure binding and storage of loose leaf books, cards, and other items. Available in sizes 15mm, 20mm, 28mm, and 40mm, with color options including pink, red, yellow, green, blue, and multicolor. Keep your loose leaf items organized and easily accessible with these practical binder rings.Features: 1. Made of high-quality plastic, flexible and durable, with high toughness and resistance to breaking. 2. Practical tool for organizing loose leaves. Suitable for binding and storing cards, loose-leaf books, and similar items. 3. Inner diameter options: 15mm, 20mm, 28mm, and 40mm. Double buckle design provides added strength, easy to fasten and secure. 4. Ideal for use with loose-leaf books, notebooks, scrapbooking, key rings, and other loose-leaf materials. 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 Product Size: Inner Diameter: 15mm, 20mm, 28mm, 40mm Product Weight: 25g, 37g, 64g, 125g Package Included: 50 x DIY Binder Ring