PB 241635 13" .065"/46 Grit .065"/46 Heavy Grit Disc Scrub Brush for Power Boss / Minuteman Scrubbers. Super aggressive .065" diameter Tynex-A or Hahls Nylon impregnated with large 46 grit silicon carbide granules. These heavy duty scrub brushes are designed for aggressive scrubbing and stripping jobs. These can be used on unsealed concrete, asphalt or sealed flooring with heavy or packed debris. Not recommended for sensitive flooring surfaces. 13" block diameter with clip-on clutch plate. Fits many Power Boss / Minuteman models including SCV 24/26 (26" Disc Brush Models). Will not fit E26 Series. Two brushes required. Priced each. Replaces Minuteman 241635, PB 241635