3M - 7200 Black Stripper Pad. The industry standard for use with water-based floor finish stripping solutions. Can also be used to clean heavily soiled concrete floors. Maintains high performance throughout the life of the pad. Removes scuffs and black heel marks to enhance floor appearance. Mineral abrasive intended to be used with water based floor finish stripping solutions to remove old soiled floor finishes and sealers. Use on low speed (175-600 RPM) rotary or automatic equipment. Pad diameter 19", Center hole diameter 3 3/8", Nominal thickness . 75".