Features: * 11 in. natural fiber cellulose sponge for larger area floor coverage * Includes scrubber pad (not required on mops with scrub brush) and 4 nylon nuts for securing on Professional No.027, Professional Scrub-A-Mop No.020 and all other Type J butterfly mops What"s In The Box: * Quickie Manufacturing 272 Pro Sponge Mop Refill Butterfly Cellulose with Scrubber