AD 56409944 42" 16 Single Row .070"/46 Grit Super Abrasive Cylindrical Scrub Brush for Nilfisk Advance 2042, BR 1100C-XL Scrubbers. Our heaviest grit filament available. Extremely durable Tynex-A or Hahls Nylon filament impregnated with 46 grit silicon carbide granules. For heavy duty scrubbing and stripping jobs on older sealed flooring and unsealed concrete flooring. 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 56409944, 409944. Our Part Number AD 56409944