FC 25-521S/G 25" 16 Single Row .050"/80 Grit Heavy Abrasive Cylinder Scrub Brush for 27" Factory Cat Tomcat Scrubbers. An abrasive cylindrical scrubbing brush for heavy duty scrubbing or stripping jobs. Long lasting .050" Tynex-A or Hahls Nylon filament impregnated with 80 grit silicon carbide granules. Equivalent to Tough Grit. Fits Factory Cat and Tomcat 26, Magnum 27, GTX 27, 2600C, and 290C scrubbers which require two 25" x 5-1/2" cylindrical scrub brushes (Listed as a 27" - 27" scrub path with brush overlap. 290C listed as 29" 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. A heavier .060"/46 grit brush can also be made. Call us at 800-277-3780 for details. Two brushes required per unit. Priced each. Replaces Factory Cat Tomcat 25-521S, 25-521G. Our Part Number FC 25-521S