FC 32-521P 32" 18 Single Row .020" Poly Cylinder Scrub Brush for Factory Cat Tomcat 34 (3400, Magnum 34, GTX 34) 35, 35SS, 38, 40, 40HD and 350 Scrubbers with Serial Numbers Below 50000 which require two 32" cylinder scrub brushes with older slotted drive hubs. An economical alternative to the soft Nylon brushes, the poly scrub brushes are great for general duty scrubbing tasks on almost all flooring surfaces. The small .020" diameter poly reaches into cracks and grout lines. These can be used on sealed and unsealed concrete, polished concrete, older painted and epoxy painted flooring, tile and most stone surfaces. Usually white, black or yellow in color. Fits Factory Cat and Tomcat 34, 3400, Magnum 34, GTX 34, 35, 35SS, 38, 40, 40HD and 350C scrubbers which require two 32" cylindrical scrub brushes (Listed as a 34" - 34" scrub path with brush overlap. 350C listed as 32" scrub path). These are the OLD style scrub brushes with the slotted drive system (newer style is a "star" drive with six notches). These are for units with serial numbers BELOW 50000. Please check your unit before ordering. For newer "star" style hub brushes, use 325-521P. These can also be made in a .030" stiff poly. Please call 800-277-3780 for details. Two brushes required per unit. Priced each. Not currently offed by Factory Cat Tomcat. Our Part Number 32-521P