CL 30264A 33" 12 Single Row High Density .070"/46 Grit Super Abrasive Cylinder Scrub Brush for Clarke Encore 33HD 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 configuration on a 31" solid plastic molded brush core (Two 31" brush cores are off-set to create a 33" scrub path). For a slightly less aggressive brush, search for 30263A, .035"/180 Scrub Grit. Not recommended for polished concrete, painted or epoxy painted flooring. Equivalent to Heavy Grit, Mal-Grit Xtra, .065"/46 Heavy Grit, .065"/46 Heavy Grit Plus. Usually black, orange, purple or grey in color. Fits Clarke Encore 33HD scrubbers. These machines require two cylinder brushes. Priced each. Replaces Clarke 30264A, 30264B. Our Part Number CL 30264A