CL 51474D 20" .035"/180 Grit Clean Grit Scrub Brush for Clarke. Low profile, dual direction, .035" diameter mid grit (180 grit) scrub brush with clutch plate for Clarke floor scrubbers. Mid grit brushes can be used many surfaces for daily general duty scrubbing tasks on surfaces such as unsealed concrete, older painted concrete, shop floors, textrued flooring, older sealed concrete with moderate debris, tile, vinyl, rubber and tertazzo. Great for cleaning grout lines. Durable blue DuPont Tynex-A or Hahls nylon filaments are impregnated with small 180 grit silicon carbide granules. If you need a stiffer grit brush for heavy duty scrubbing or stripping jobs, we offer a .050" Nylo-Grit scrub brush - Use CL 51450D. Please call 800-277-3780 if you need a special grit brush. 18" diameter block ensures proper clearance. Fits Clarke floor scrubber models including Vision 20, Leader 2000E/2000B, Encore 20 Series (L20, S20 and S20E) scrubbers. Please note that some older Leader 2000 series units take a snap on gimbal instead of a twist on flat clutch plate. Please check your model before ordering. One pad driver required per unit. Priced Each. Replaces Clarke 51474D. Our Part Number CL 51474D