Feature 1SPECIFICATIONS: Double wire binding spine, with 14.3mm binding diameter, 34 loops, and 3:1 ratio, can accommodate up to 120 sheets of paper (A4, 70g). 2DOUBLE METAL WIRE: These binding coils are made of excellent metal wire, which is sturdy and durable, allowing you to easily bind paper and store it for a long time. 3NYLON COATING: These binding spines have nylon coating on the outside, with good glossiness, corrosion resistance, wear resistance, and has a long service life. 4MULTIPLE USES: These double wire spiral binding spines can be used for organizing documents, files, reports, etc., and compatible with most wire binding system. 5100PCS IN 1 SET: Includes 100 pieces double wire binding coils, lightweight and compact, which are easy to use and replace, meeting various paper binding needs.Item Type: Spiral Binding SpinesBinding Diameter: 14.3mm (9/16in)Binding Capacity: 120 Sheets (A4, 70g)Number of Loops: 34LoopsRatio: 3:1 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List100 x Binding Coils