Features 120 SHEETS CAPACITY: The twin-loop wire binding spines have a diameter of 9/16", a thickness of 0.8mm, and holds up to 120 sheets of paper (A4, 70g). STEP 3:1 - These double loop binding spines have 3 holes per inch for 3:1 step binders or folders with breakaway pins, 34 double loops, 360 degree rotation. APPLICATION: The double loop spiral binding coil has a total of 100 for binding important documents, files or reports for upcoming presentations or projects. Compatible with most wire binding systems. METAL INNER WIRE: The inside of the binding spines is made of metal wire, which is sturdy and durable, allowing you to easily prepare your paper and store it for a long time. NYLON COATING: The exterior is coated in nylon with glossy surfaces that are resistant to corrosion and abrasion and have a long service life. 1. 120 SHEETS CAPACITY: Twin-loop wire binding spines have a diameter of 9/16", a thickness of 0.8mm, and holds 120 sheets of paper (A4, 70g) 2. STEP 3:1 - These double loop binding spines have 3 holes per inch for 3:1 step binders or folders with breakaway pins, 34 double loops, 360 degree rotation. 3. APPLICATION: The double loop spiral binding coil has a total of 100 for binding important documents, files or reports for upcoming presentations or projects. Compatible with most wire binding systems. 4. METAL INNER WIRE: The inside of the binding spines is made of metal wire, which is sturdy and durable, allowing you to easily prepare your paper and store it for a long time. 5. NYLON COATING: The exterior is coated in nylon with glossy surfaces that are resistant to corrosion and abrasion and have a long service life. Specification: Item Type: Wire Binding Spines Material : Iron, Nylon Binding Diameter: 14.3mm (9/16") Binding capacity: 120 sheets (A4, 70g) Number of teeth: 34 teeth Ratio: 3:1 How to use: Take out the product, install it and use it. Packing List: 100 x Wire Binding Spines Package List 100 x Wire Binding Spines