1、120 SHEET CAPACITY: Double loop wire binding spines are 9/16 inch in diameter, 0.8 mm thick, and hold up to 120 sheets of paper (A4, 70g) 2、3:1 PITCH: These double loop binding spines have 3 holes per inch for 3:1 pitch binders or binders with breakaway pins, 34 double loops, 360 degree rotation. 3、APPLICATION: Double loop spiral binding coil has a total of 100 to bind 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 strong and durable, allowing you to easily prepare your paper and store it for a long time. 5、NYLON COATING: The exterior is nylon coated with a glossy surfaces that is corrosivity and abrasion resistant and has a long service life. Item Type: Wire Binding Spines Material: Iron, Nylon Binding Diameter: 14.3mm (9/16 inch) Binding Capacity: 120 Sheets (A4, 70g) Number of Teeth: 34 Teeth Ratio: 3:1 100 x Wire Binding Spines