FC 25-421C 12" .035"/180 Mid Grit Disc Scrub Brush for Factory Cat / Tomcat Floor Scrubbers. .035" diameter DuPont Tynex-A or Hahls Nylon filament is impregnated with slightly abrasive 180 grit silicon carbide granules. These mid grit brushes can be used on most painted shop flooring, older sealed concrete, unsealed concrete, tile, stone, terrazzo, quarry tile, rubber, textrued synthetic flooring and other surfaces. The long trim scrub brushes can reach into grout lines for excellent cleaning results. Our most popular grit brush. Designed for everyday general duty cleaning of dirt and debris. Great for textrued flooring surfaces. Not for use on newly painted or high gloss flooring. Slightly more aggressive than Light Grit. Equivalent to Midi-Grit, Scrub-Grit II, Clean Grit. Commonly blue, grey, or rust in color. Replaces blue floor pads. Tynex-A / Hahls filaments outlast standard poly and Nylon filaments. We also offer a heavier .050"/80 Nylo-Grit scrub brush (FC 25-421S), or a lighter Scrub grit .022"/120 grit scrub brush (FC 25-421PS). Includes older style 6 point clutch plate commonly used on non-converted models with serial numbers BELOW 50000. Some newer models require a 8 point clutch plate (if an 8 point plate is needed, please reference this in the Special Instructions box at checkout). Fits Factory Cat and Tomcat branded floor scrubbers including Factory Cat GTX and Magnum Series models with serial numbers BELOW 5000. Please check your clutch plate set-up before ordering. Priced Each. Replaces Factory Cat 25-421C. Our Part Number FC 25421C