CL 51447D 20" Polypropylene Scrub Brush for Clarke Floor Scrubbers. Low profile, dual direction, poly scrub brush with clutch plate for Clarke floor scrubbers. General duty polypropylene scrub brush is an economical alternative to the longer lasting nylon scrub brush. Poly brushes can be used on everything from unsealed concrete, polished concrete, sealed concrete, tile, vinyl, stone, tertazzo, travertine, rubber and slate. Poly filaments will not damage your surfaces. If you need a softer brush for highly polished flooring, we offer a soft nylon. Please call 800-277-3780 for details. 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 51447D. Our Part Number CL 51447D