PB 7845 17" .040"/120 Grit Scrub Brush for Minuteman Power Boss Phoenix 33 and E33 Disc Brush Model Floor Scrubbers. Our heaviest grit brush. This .040"/120 grit brush is perfect for heavy duty scrubbing on quarry tile, older sealed and unsealed concrete (Not recommended for newly painted or epoxy painted floors). The .040" diameter crimped DuPont or Hahls nylon filaments are imbedded with 120 grit silicon carbide granules. Great for scrubbing grout. For lighter duty scrubbing jobs, use our .035"/180 Heavy Grit (PB 7845) or our Light Grit .018"/500 (PB 7826). We can also make a .050"/80 super heavy grit if needed. Please call. Fits Minuteman Power Boss Phoenix 33 walk behind scrubbers. Also fits Hakomatic B70/B90, B1050/TB1230, B1100/TB1230, B310R/TB1230 (85cm Models). Listed as Extra Heavy Duty PA6.12 Green. Commonly grey or green in color. Comes prepped with 18 tooth splined clutch plate. Two brushes required. Priced Each. Replaces Minuteman Power Boss 7845, 99784500. Our Part Number PB 7845