WI 02440 / 86000440 20" .035"/180 Grit Scrub Brush for Windsor Floor Scrubbers. Long lasting .035" diameter Tynex-A or Hahls Nylon filament is impregnated with 180 grit silicon carbide granules for everyday scrubbing of tile, sealed concrete, unsealed concrete, quarry tile, terrazzo, vinyl flooring with mild to heavy dirt and debris. Not recommended for newly painted or epoxy painted flooring. 20" diameter block includes 6-point spring loaded clutch plate. Fits Windsor scrubbers including Saber Compact 20 (SC20, SC20T, SCX20T), Chariot I-Scrub 20 Disc brush models (Will not fit Compact C17J / C17BJ), and Trident TR20 (with newer larger hex clutch plate). For a softer brush in this series, call us for .022"/120 Grit or softer .018"/500 Grit. For a more aggressive brush, call about our .050"/80 Grit or .065"/46 Grit stripping brush. One brush required on most models. Replaces Windsor 02440, 8.600-044.0 Our Part Number WI 02440, WI 86000440