AD 56505942 15" .050"/80 Grit Abrasive Disc Rotary Scrub Brush for Nilfisk Advance Scrubbers. Our second heaviest grit scrub brush for stubborn soils. Great for heavy duty scrubbing or stripping of unsealed concrete flooring or aging sealed flooring surfaces. .050" diameter Tynex-A or Hahls Nylon filament impregnated with 80 grit silicon carbide granules. Equivalent to Dyna Grit, Nylo-Grit, and Mal-Grit (Usually black in color). Filament is set in a 14" diameter solid heavy duty plastic molded block. Includes 3 drive lugs mounted around a 5.53" center hole. Fits Nilfisk Advance scrubbers and sweeper/scrubbers including Captor 4300, 4300-AXP, Nilfisk CR 1100, CR 1100B. 3 Required Per Unit. Priced Each. Replaces Nilfisk-Advance 56505942, 505942. Our Part Number AD 56505942