FC 13-421DS 12" .018"/500 Soft Grit Disc Scrub Brush for Factory Cat 25, Tomcat 2500D, MiniMag 26D, Magnum 26D and GTX 250-26D Disc Brush Model Scrubbers. Our lightest grit brush available. An exclusive item not offered by Factory Cat or Tomcat. Soft .018"/500 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 .018" bristle reaches small grout lines. These are commonly used on newer sealed or unsealed concrete flooring with light debris. Includes 8-Point clutch plate with spring clip. Usually grey or light green in color. Equivalent to Dyna-Scrub or Mal-Grit Lite. 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 brush is needed for fear of dulling shiny flooring, use 13-421N, Nylon. Some of these models require either disc or cylinder scrub brushes. Please check your model before ordering. Our Part Number FC 13-421DS