FC 13-421PS 12" .022" Light Grit 120 Disc Grit Scrub Brush for Factory Cat 25, Tomcat 2500, MiniMag 26D, Magnum 26D and GTX 250-26D Disc Brush Model Scrubbers. As the name describes, the .022"/120 grit scrub brushes can be used for everyday light to general duty scrubbing on hard surfaces including tile floors, rubber flooring, quarry tile, sealed concrete, epoxy painted flooring, painted concrete or polished concrete flooring. The narrower bristle reaches grout lines. These are commonly used on older sealed or unsealed concrete flooring with light debris. Includes 8-Point clutch plate with spring clip. Usually grey or red in color. Equivalent to Light Grit. 12" diameter block with a 13" scrub path. Commonly listed as a 13" brush. Most machines require two brushes, priced each. These are commonly bundled to reduce shipping costs. If a less aggressive grit brush is needed, ask for the .018"/500 grit brushes. Our Part Number FC 13-421DS. Some of these models require either disc or cylinder scrub brushes. Please check your model before ordering. Replaces Factory Cat Tomcat 13-421PS. Our Part Number FC 13-421PS