The 3M 4100 White Super Polish floor pad is built for light daily cleaning under automatic scrubbers, removing soil and scuff marks with minimal dulling of the finish. Fine cleaning particles are distributed throughout the durable, conformable polyester fibers, not just on the surface, so performance holds up over the pad's life. The open construction resists loading and clogging, and the pad is reversible. Use for spray buffing or dry buffing soft finishes, including wood floors, on rotary and automatic floor machines running 175-600 rpm. Sized 21 in. Sold 5 pads per case.