FC 20-421P 20" .030" Diameter Poly Disc Scrub Brush for Factory Cat Tomcat Floor Scrubbers. General duty polypropylene scrub brush designed for every day scrubbing jobs on most surfaces. Used for removal of moderate to light dirt and soils on sealed concrete, textrued concrete, polished concrete, terrazzo, non-slip flooring, slate, travertine, rubber, VCT, and other hard industrial surfaces. Poly brushes will not harm sensitive flooring surfaces such as epoxy painted flooring or rubber flooring. If a softer brush is needed, use FC 20-421N, soft nylon. Commonly blue or black in color. Fits Factory Cat and Tomcat scrubber models including Factory Cat MicroMag 20D, XR-40, 2017-20 and 2023-20. The XR Series and 2017/2020 Series have other models which require different diameter scrubbing brushes. Please check your existing brush block diameter before ordering. These are manufactrued on a 19" diameter heavy duty poly scrubbing block and have a 20" wide scrub path. Two brushes are required for the XR-40. One brush required for the MiniMag 20D, 2017-20, 2023-20. Includes the 8 point clutch plate. Priced Each. Replaces RPS Factory Cat Tomcat 20-421P. Our Part Number FC 20-421P