Use this specialty 5:1 pitch color coil along with your 5:1 pitch coil punch for a special tightly wound coil binding. This coil provides a similar look and feel that you get with the more common 4:1 pitch coil. However, the 5:1 pitch provides a more elegant tightly wound bind. This 5:1 pitch coil is available in sizes from 6mm (1/4") up to 25mm (1"). Spiral coil is the perfect answer for documents that are frequently mailed or handled because of its durability. With spiral binding pages turn easily, books can lay flat or can be folded back to back. This 5:1 pitch coil is available in more than 60 colors, 18 sizes and in many different lengths. Spiral Coil Binding is the perfect answer for documents that are frequently mailed or handled because of its durability: with Color Coil pages turn easily, books can lay flat or can be folded back-to-back. The coils below are all 12" in length however, we also carry 9" Coil for Half Size Books , 15" Coil For Legal Size Books , 18" Coil for 11" x 17" Books and 36" Spiral Coil.