CL 30397A 15" .035"/180 Clean Grit Scrub Brush with Gimbal for Clarke Encore L30 Series Floor Scrubbers. These mid grit brushes are filled with durable DuPont Tynex-A or Hahls nylon filament which is impregnated with 180 grit silicon carbide granules. The narrower .035" diameter filaments are great for daily aggressive top scrubbing of ceramic tile, unsealed concrete, older sealed concrete, quarry tile, rubber, slate, stone, terrazzo, vinyl tile flooring surfaces. These can also be used on older painted and textrued flooring surfaces. For highly polished or urethane flooring, use the soft nylon brushes (CL 30395A) to prevent any possible marring. We offer a lighter .018"/500 grit (CL 30394A) and a more aggressive .050"/80 grit (CL 30397-80 - Add the CL 30397's to your cart and reference CL 30397-80 in the special instructions box at checkout). Fits Nilfisk Clarke L30 series (will not fit S30 floor scrubbers, use CL 30464A, 15" Clean Grit) scrubbers which require two 15" diameter scrub brushes equipped with the brush drive gimbal (CL 833802). The drive gimbal can be identified by it's raised slotted circular featrue, sometimes encircled by a metal brush retaining ring (CL 833801). These gimbal brushes "snap" up onto the brush drive motor rather than "twist" on like a conventional clutch plate equipped brush. 15" diameter brush with a 1-3/4" trim length. Replaces blue pads. Equivalent to Clean Grit, Scrub-Grit III, Blue Grit. Commonly grey or blue in color. Priced Each. Replaces Nilfisk Alto Clarke CL 30397A. Our Part Number CL 30397A