TN 240251 20" .018"/500 Grit Dyna-Scrub Light Grit Scrub Brush with Lugs for Tennant, Blue Star 20" Floor Scrubbers. Our lightest grit brush. .018" diameter DuPont Tynex-A or Hahls Nylon filament is impregnated with very small 500 grit silicon carbide granules. These light grit brushes can be used on older painted shop flooring, sealed concrete, unsealed concrete, tile, stone, terrazzo, quarry tile, rubber flooring, and other surfaces. Designed for everyday general duty cleaning of lighter dirt and debris. Not for use on newly painted high gloss flooring. Tynex-A or Hahls filaments outlast standard poly and Nylon filaments. 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 240251. Our Part Number TN 240251.