AD 56409943 42" 16 Single Row .050"/80 Grit Abrasive Cylindrical Scrub Brush for Nilfisk Advance 2042, BR 1100C-XL Scrubbers. Long lasting 80 grit impregnated Tynex-A or Hahls Nylon filament designed for medium to heavy duty scrubbing and stripping. These can be used on sealed (unpainted) and especially unsealed concrete flooring. Equivalent to Nylo-Grit, Dyna Grit, and Mal-Grit. Our second heaviest grit behind the .070"/46 Grit (56409944) brushes. Fits Nilfisk Advance 2042 Hydro Retriever and BR 1100C-XL riding floor scrubbers. Actual length 40.875". Two cylindrical brushes required. Priced each. Replaces Nilfisk Advance 56409943, 409943. Our Part Number AD 56409943