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

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

【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.