Rayson 5/8" Plastic Spiral Binding Coils, White, 15.9mm Diameter, 3:1 Pitch, Binds Up to 140 Sheets, 12" Length, Coil Binding Spines for Letter & A4 Paper, Pack of 100

Rayson 5/8" Plastic Spiral Binding Coils, White, 15.9mm Diameter, 3:1 Pitch, Binds Up to 140 Sheets, 12" Length, Coil Binding Spines for Letter & A4 Paper, Pack of 100

• 【Fits Letter & A4 Size Paper】 – Each coil measures approx. 12 inches, perfectly suited for U.S. Letter (8.5" x 11") and ISO A4 (8.3" x 11.7") paper. Can be easily trimmed for shorter sizes like B5 and B6.
• 【3:1 Pitch Configuration】 – Designed with 3 holes per inch, specifically for use with 3:1 pitch binding machines. ! Not compatible with 4:1 pitch systems, which use a different hole spacing and require different coils.
• 【5/8" Diameter – Binds Up to 140 Sheets】 – With a 15.9mm diameter, each coil can bind up to 140 sheets of 20 lb copy paper—ideal for mid-sized reports, manuals, and workbooks.
• 【Durable & Flexible Plastic】 – Made from smooth, resilient plastic for easy coil insertion, reliable performance, and long-lasting use. White finish gives a clean, professional look.
• 【100-Pack Value】 – Includes 100 white binding coils—an excellent supply for schools, offices, print shops, or home-based projects.