Our ColorCoil offers a quality, professional look while binding documents up to 2" thick. 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. We carry more than 60 colors of 4:1 pitch coil , 5:1 Pitch Coil, and 3:1 Pitch Coil and in custom lengths. See below for a coil sizing chart and list of all of the colors we carry.