FC 19-421PS 19" .022"/120 Light Grit Scrub Brush for Factory Cat Tomcat Floor Scrubbers. .022" diameter DuPont Tynex-A or Hahls Nylon filament is impregnated with slightly abrasive 120 grit silicon carbide granules. These light grit brushes can be used on painted shop flooring, sealed concrete, unsealed concrete with light debris, 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. The 1-3/4" flexible filaments can reach into grout lines for excellent cleaning results. Great for textrued flooring surfaces. Slightly less aggressive than Midi-Grit. Equivalent to Light Grit, Scrub-Grit 2. Commonly red or grey in color. Replaces red floor pads. Tynex-A filaments outlast standard poly and Nylon filaments. We also offer a heavier .035"/180 Scrub-Grit 3 scrub brush (FC 19-421C), or we can make a lighter .018"/500 grit scrub brush (please call 800-277-3780 for details). Includes 8 point clutch plate. Some older models require a 6 point clutch plate (if a 6 point plate is needed, please order FC 5-421PS). Some of these models also use cylinder scrub brushes instead of disc brushes. Please check your existing brush set up before ordering. Fits Factory Cat and Tomcat floor scrubber models including Factory Cat 38, 40, 40HD, 550D and Tomcat 3700D. Most machines require two brushes per unit. Factory Cat 550D requires three brushes. Priced Each. Replaces Factory Cat Tomcat 19-421PS. Our Part Number 19-421PS