These Medium Fastback Composition Binding Strips can bind upto 250 sheets of 20lb paper or upto 1" thick documents. These Fastback Composition strips are smooth-textured strips designed to coordinate with our Comp covers to give your documents a finished, consistent appearance. These Medium Fastback Composition Binding Strips are available in 5 popular colors (Black, Dark Green, Red, White and Maroon) and available in either 8.5" or 11" long.