Silicone carbide impregnated in nylon bristles is self-replenishing as brush wears, offering unmatched value that outlast floor pad over 100 to one. That translates directly into time and cost savings. Featuring our water and chemical resistant Tuff-Block® to insure that the block last as long as the bristles for maximum life expectancy. Must be run in a wet environment. This heavy gauge nylon with larger grit is used for stripping heavily soiled floors, such as concrete floors in an industrial setting. Grit Size: 46. Bristle Color: Orange; Bristle Diameter: .070. Pad Replacement: High Productivity.