FC 18-421N 18" .016" Soft Nylon Scrub Brush for Factory Cat Tomcat 350D, 52, 5100 Disc Brush Model Scrubbers which Require 8 Point Drive Plates. General duty and long lasting soft .016" diameter level white or black Nylon. An HMP Supply special item. These soft Nylon scrub brushes are great for light duty scrubbing of some polished hard surfaces and most delicate medium to soft surfaces. These soft nylon brushes will not harm polished flooring found in some plants and auto dealership showrooms. For a slightly stiffer Nylon for most surfaces such as grit impregnated epoxy painted floors, use our .030" diameter Nylon (FC 18-421N30). 17" diameter plastic block (18" scrub path) with an 8-point clutch plate (Please check your model for the proper number of points. We offer a 6 point and 8 point clutch plate. Use 2-421N for 6 pt.). Fits Factory Cat and Tomcat 350D (Disc Model), 52 and Tomcat 5100 floor scrubbers. Two brushes are required for model 350D, three brushes are required for models 52 and 5100. Priced Each. Replaces Factory Cat Tomcat 18-421N, 52-421N. Our Part Number FC 18-421N