TN 240253 20" .070"/46 Strata Grit Scrub Brush with Lugs for Tennant, BlueStar 20" Floor Scrubbers. Our heaviest grit brush. .070" diameter DuPont Tynex-A or Hahls Nylon filament is impregnated with large abrasive 46 grit silicon carbide granules. These heavier grit brushes can be used on older shop flooring with heavy packed debris, older sealed concrete, and unsealed concrete. The strata grit brushes can also be used for stripping of tile, terrazzo, quarry tile, and other similar hard surfaces. Replaces black and high productivity floor pads. Not for use on newly painted flooring. Tynex-A or Hahls filaments outlast standard poly and Nylon filaments. We also offer a lighter .035"/180 mid grit scrub brush (TN 240251-35), or abrasive .050"/80 grit scrub brush (TN 240252). 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 240253. Our Part Number TN 240253.