Check the listing for details. Rayson 9.5mm Spiral Binding Coil 3/8in Black Coil Binding Ring 4:1 Pitch 100/.... Condition: New. Listed at 24.66 USD. Rayson 9.5mm Spiral Binding Coil 3/8in Black Coil Binding Ring 4:1 Pitch 100/Box SBR-80-100-B ✓ Free 60 Day Returns ✓ Free Express Shipping Description: Features: Binding Capacity: up to 50 sheets ( 80g 20lb)Length: 12 (48 Loops). It can be used with U.S. letter size paper (8.5 x 11inches) Or used with ISO standard A4 size paper (8.3 x 11.7inches)100 per box, Color: Black4:1 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.)4:1 pitch spiral binding coils great for reports and presentations with any 4:1 pitch coil binding machine. Product Details: Manufacturer: ‎RaysonBrand: ‎RAYSONItem Weight: ‎1.06 poundsPackage Dimensions: ‎13.19 x 7.24 x 2.64 inchesItem model number: ‎10305553Is Discontinued By Manufacturer: ‎NoMaterial Type: ‎PaperSize: ‎3/8inch-4:1Manufacturer Part Number: ‎10305553Date First Available: January 3, 2018