Rayson 3:1 Pitch Plastic Spiral Binding Coils, 7/16" Diameter, 11.1mm, Binds Up to 80 Sheets, Letter Size (8.5" x 11"), Black, Pack of 100

About this item

• 【3:1 Pitch Compatibility】Designed for use with binding machines that punch 3 holes per inch. Not compatible with standard 4:1 coil systems.
• 【Binds Up to 80 Sheets】Each 7/16" (11.1mm) diameter coil holds approximately 80 sheets of 20 lb paper, ideal for medium-sized documents.
• 【Flexible & Durable】Made of high-quality plastic that is lightweight, flexible, and resistant to bending or cracking during everyday use.
• 【Versatile Use】Compatible with both U.S. Letter size paper (8.5" x 11") and ISO standard A4 paper (8.3" x 11.7"). Each plastic coil measures approximately 12" in length with 36 loops and can be easily trimmed to fit shorter sizes like B5 or B6 using RAYSON coil crimper pliers.
• 【Value Pack of 100】Includes 100 black binding coils, providing excellent value for bulk users, print shops, or regular office use.