FC 25-521SG 25" 18 Single Row .018"/500 Soft Grit Light Abrasive Cylinder Scrub Brush for 27" Factory Cat Tomcat Scrubbers. Our softest non-abrasive cylindrical scrubbing brush for light duty scrubbing jobs on polished, epoxy painted or other sensitive flooring surfaces. Long lasting, .018" DuPont Tynex-A or Hahls Nylon filament impregnated with our lightest 500 grit silicon carbide granules. Lighter and softer than Light Grit. Fits Factory Cat and Tomcat 26, Magnum 27, GTX 27, 2600C, and 290C scrubbers which require two 25" cylindrical scrub brushes (Listed as a 27 Inch - 27" scrub path with brush overlap. 290C listed as 29" scrub path with overlap). 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. Two brushes required per unit. Priced each. Our Part Number 25-521SG