The Rubbermaid Commercial backpack floor finishing kit is an all-in-one system that makes finishing floors of all types easy. Backpack features a time-saving 1-1/2-gal. reservoir with a large 3 opening for faster refilling. For use with floor finishes or cleaning chemicals. 58 handle accepts 18 frame and mop. Replacement pads and string mops sold separately. Flat Backpack Mop Kit Nylon