FC 285-821PS 28" 18 Single Row .022"/120 Light Grit Abrasive Cylinder Scrub Brush for Factory Cat / Tomcat 30" Cyl. Scrubbers (Magnum 30 / GTX30) with the New Style Splined Drive Hubs. 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. Great for everyday scrubbing jobs. We can also make these brushes in a super soft .018"/500 grit (search for 285-821SG, Soft Grit or call 800-277-3780 for details). Equivalent to Light Grit. Fits Factory Cat and Tomcat Magnum 30 and GTX 30 scrubbers. (Listed as a 30C New Style - 30" scrub path with brush overlap). These have newer splined hub with 6 notched hubs. For models with serial numbers ABOVE 50000. For older models with serial numbers BELOW 50000 with the slotted type drive hubs, use 28-521PS. May fit models that have been converted to new splined brush drives which include 28, 2800C, 2800EX, 29, 3000C, and 350 (28" Cyl. Models). Please check your model and brush drive type before ordering. Commonly grey or red in color. Equivalent to Light Grit, Scrub-Grit II, and Red Grit. 2 brushes required. Priced Each. Replaces Factory Cat / Tomcat 285-821PS