FC 25-521PS 25" 18 Single Row .022"/120 Light Grit Cylindrical Scrub Brush for Factory Cat / Tomcat Scrubbers. One of our lighest grit scrub brushes available. Soft .022" diameter DuPont Tynex-A or Hahls Nylon impregnated with 120 grit silicon carbide granules. For scrubbing epoxy painted flooring, tile, stone, polished concrete and sealed concrete flooring with light soils and debris. We can also make these brushes in a super soft .018"/500 grit (search for 25-521SG, Soft Grit or call 800-277-3780 for details). Equivalent to 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. Replaces Factory Cat / Tomcat 25-521PS. Our Part Number FC 25521PS