CL 30263A 33" 12SR .035"/180 Mid Grit Cylinder Scrub Brush for Clarke Encore 33HD Scrubbers. Our .035" diameter, 180 grit filament is great for general duty, every day scrubbing tasks on unsealed concrete, sealed concrete, older painted and epoxy painted flooring and most tile and stone surfaces. Much softer than the aggressive .070"/46 grit (30264A) brushes. Long lasting DuPont Tynex-A or Hahls Nylon filaments impregnated with 180 grit silicon carbide granules are set in a heavy duty 31" plastic molded brush core (These units require two 31" cylinder scrub brushes which are slightly offset to produce a 33" scrub path). Equivalent to Medium Grit, Clean-Grit, Scrub-Grit 3 and Blue Grit. Commonly blue in color. Not recommended for painted or epoxy painted flooring. These can be used on older painted flooring. Fits Clarke Encore 33HD scrubbers. These machines require two cylinder brushes. Priced each. Replaces Clarke 30263A, 30263B. Our Part Number CL 30263A