Features 1. HIGH PAPER CAPACITY These double loop binding rings can hold up to 120 sheets of paper (A4, 70g), meeting your important binding needs. 2. Metallic Inner Wire: The binding wires are made of high-strength metal iron, solid and durable, allowing you to join papers easily for long-term storage. 3. NYLON COATED - The cables feature an external nylon coating that offers good surface gloss, corrosion resistance and wear resistance for long time use. 4. PERFECT SIZE - Each binding spine has a diameter of 9/16" and a thickness of 0.8mm. Each spine has a 3:1 pitch and has 34 double loops, allowing 360 degree rotation. 5. Application: Used to bind documents, files or important reports for your upcoming presentations or projects. Compatible with most wire binding systems (3:1 pitch and 34 hole pattern). Specification: Item Type: Spiral Double Loop Wire Binding Rings Material: iron, nylon Binding diameter: approx. 14.3 mm/0.56 inches Binding capacity: 120 sheets (A4, 70g) Teeth Quantity: 34 Teeth Ratio: 3:1 Packing List: 100 x Binding Spine with Comb Package List 100 x Comb Binding Spine