AD 56505077 18" .022" Medium Poly Disc Rotary Scrub Brush for Nilfisk Advance Floor Buffers and Scrubbers. .022" soft to medium polypropylene scrub brush for light to general duty scrubbing on sensitive flooring such as painted or epoxy painted flooring, high polished urethane flooring or textrued concrete surfaces. The smaller diameter poly filament reaches grout lines on tile flooring and tough to reach spaces on raised/textrued flooring. Equivalent to ProLite. Includes NP-47 style twist on clutch plate. (***Some models had the NP-92 twist on clutch plate - Listed as Gold NP-92 Drive Cap. If your model has this NP-92 series, search for 56505925 or call 800-277-3780 to specify***). Fits Nilfisk Advance scrubbers and buffers including Galaxie 20, MP-20 HS, Mobilmatic 20, Whirlamatic 200, Pacemaker 20, Pacemaker P20E, Matador 20, Hydro-Retriever 200, 200HD, Convertamatic 20B, 20E, 200B, 200E, 200LX, 200BD, and Nilfisk BA 500. These brushes have a 5" center hole with before mounting the clutch plate. Many machines require one, or in some rare cases, two brushes. Please check your machine before ordering. 19" scrub path. Often listed as 19". Replaces Nilfisk-Advance 56505077, 505077. Our Part Number AD 56505077