1120 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) 23:1 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. 3APPLICATION: 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. 4METAL 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. 5NYLON COATING: The exterior is nylon coated with a glossy surfaces that is corrosivity and abrasion resistant and has a long service life. 100 x WireBindingSpines