Rayson 5/16" Plastic Spiral Binding Coil, 40 Sheets Capacity, 4:1 Pitch 7.9mm White Coil Binding Spines for Business and Educational Purposes, Pack of 100

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About this item Binding Capacity: up to 40 sheets ( 80g/20lb) - with 3mm margin. (7mm margin can be bound with 5-10 sheets), ideal for smaller documents and light-duty projects. Ve rsatile: Compatible with U.S. letter size paper (8.5"x11") or ISO standard A4 size paper (8.3"x11.7"). Length: About 12" (48 Loops). The length can be easily adjusted to fit your needs using RAYSON coil crimper pliers Durable Construction: Crafted from sturdy plastic, these coils are designed for long-lasting use. Great Value: Each pack includes 100 white coils, offering an affordable solution for bulk binding needs 4:1 Coil binding ring means per inch has 4 holes (This is very important distinguish 3:1 from 4:1 cause the things to be as different. 3:1 means per inch has 3 holes. They are used with different binding machine.) Designed for 4:1 pitch coil binding machines, these spiral binding coils are ideal for reports, presentations, and office projects. A practical and thoughtful gift for professionals, educators, and students alike Show more