FC 20-421N 20" .020" Medium-Soft Nylon Disc Scrub Brush for Factory Cat Tomcat Floor Scrubbers. General duty soft .020" diameter nylon scrub brush designed for every day scrubbing jobs on most surfaces. Used for removal of light dirt and soils on sealed concrete, textrued concrete, polished concrete, terrazzo, non-slip flooring, slate, travertine, rubber, VCT, and other surfaces. Nylon brushes will not harm sensitive flooring surfaces such as epoxy painted flooring or rubber flooring. Soft nylon brushes are commonly used on polished flooring found in car dealerships or epoxy coated flooring found in airport hangars. If a stiffer non-abrasive brush is needed, use FC 20-421P, medium poly. Commonly yellow or white in color. We can make these in a softer or stiffer nylon if desired. 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 20-421N. Our Part Number FC 20-421N