PB 3331082 42" .065"/46 Grit Super Abrasive Cylindrical Main Sweep/Scrub Broom for Power Boss 9082, Monitor 82 Series Double Scrubbers. Our heaviest grit for aggressive scrubbing of unsealed or older sealed concrete floors with heavy dirt and debris. The heavy grit brushes can also be used for stripping finish and sealers from sealed concrete flooring. Long lasting DuPont Tynex-A or Hahls Nylon impregnated with large 46 grit silicon carbide granules are arranged in a high density 24 single row configuration. Fits double scrubbers from Power Boss including 9082 and Monitor 82 scrubbers which require one 42" cylinder sweep/scrub brushes. These units also require clip-on power drive style disc scrub brushes; 3 standard and 4 if using a side scrub brush option. Equivalent to Powergrit 46HDS, Mal-Grit Xtra and Brown Grit. Priced each. 1 cylinder scrub/sweep brush required per unit. Replaces Power Boss 3331082