Item Type: Double Loop Wire Material: Iron, Nylon Binding Diameter: Approx. 12.7mm / 1/2in Binding Capacity: 100 Sheets (A4, 70g) Loop: 34 Loop Pitch: 3:1 1[Binding Capacity] The double loop binding wire can bind up to 100 sheets (A4, 70g) with its 12.7mm binding diameter, ensuring your documents are securely held together. 2[Metal Wire] The interior of the binding wire is made of iron, which is sturdy and built to withstand frequent use, allowing you to easily organize paper and store for a long time. 3[Nylon Coating] The exterior is coated with nylon, which has a good surface gloss, corrosion resistance, wear resistance, and long service life. 4[Perfect Size] The diameter of each binding wire is 1/2 inch, with a thickness of 0.8mm, with 3:1 pitch and 34 double loops, compatible with most wire binding systems. 5[Versatile Design] The wire binding ring is suitable for various binding needs, including reports, presentations, and more, offers a professional and organized look for your documents. 100 x Double Loop Wire