Do you have a plastic comb binding machine, but are sick and tired of plastic combs? Do you want to use higher quality spines? These spines can be used with plastic comb binding machines, since they need 19 holes, but you will also need a wire closer. We offer 10 different sizes, with sheet capacities ranging from 40 to 200 sheets of 20lb paper. With this new addition to your bound documents, you're sure to impress clients!