Rayson 31.8mm Plastic Spiral Coil Binding 3:1 Pitch, 1-1/4 inch, 280 Sheets Capacity Black Coil Binding Spines - Versatile for Office and Educational Tasks, Pack of 50

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About This 【Generous Capacity】Capable of binding up to 280 sheets of 80g/20lb paper, ideal for handling large documents and high-volume projects 【Wide Compatibility】Designed for bo th U.S. letter size (8.5"x11") and A4 size (8.3"x11.7") paper. Each coil measures approximately 12" in length with 36 loops and can be easily trimmed using RAYSON coil crimper pliers to suit specific needs 【Built to Last】Constructed from durable plastic, these coils ensure long-lasting performance and secure binding for all your documents 【Cost-Effective】A pack of 50 black coils offers an economical solution for binding large volumes of documents 【3:1 Pitch Configuration】Features 3 holes per inch, specifically designed for 3:1 pitch binding machines, distinguishing it from the 4:1 pitch format Show more