Fellowes 52372 Plastic Comb Bindings, 1/2" Diameter, 90 Sheet Capacity, White (Pack of 100 Combs) Plastic comb bindings for use with Fellowes or any standard 19-ring comb-binding system. Choose from a variety of colors to create a custom look. 19-ring plastic combs available in a large selection of sizes For use with Fellowes or any standard 19-ring comb-binding system.