TN 240252 20" .050"/80 Grit Nylo Grit Abrasive Bristle Scrub Brush with Lugs for Tennant, BlueStar 20" Floor Scrubbers. Our second heaviest grit brush. .050" diameter DuPont Tynex-A or Hahls Nylon filament is impregnated with 80 grit silicon carbide granules. These heavier grit brushes can be used on older shop flooring, older sealed concrete, unsealed concrete, tile, stone, terrazzo, quarry tile, and other surfaces. Designed for stripping jobs or for everyday heavy duty cleaning of dirt and debris. Not for use on newly painted flooring. Tynex-A or Hahls filaments outlast standard poly and Nylon filaments. We also offer a lighter .018"/500 grit scrub brush (use TN 240251), our custom .035"/180 mid grit scrub brush (TN 240251-35), or our most abrasive strata grit scrub brush (TN 240253). Fits Tennant branded floor equipment including Tennant 5200 (Battery and Electric Models), Nobles Speed Scrub 2001 (Battery and Electric Models) , 2001HD, WB-20E, BA-2000B, FS-2000 (Battery and Electric Models), and BlueStar 20" Automatic walk-behind floor scrubbers. One brush required per unit. Priced Each. Replaces Blue Star, Nobles, Tennant 240252. Our Part Number TN 240252.