AD 56505058 18" .070"/46 Grit Super Abrasive Disc Rotary Scrub Brush for Nilfisk Advance Floor Buffers and Scrubbers. Our heaviest grit scrub brush for the most stubborn soils. Great for extra heavy duty scrubbing or stripping of unsealed concrete flooring or aging sealed flooring surfaces. .070" diameter Tynex-A or Hahls Nylon filament impregnated with 46 grit silicon carbide granules. Equivalent to Magna Grit, .065"/46 Heavy Grit Plus, and Mal-Grit Extra (Usually rust, orange, brown or purple in color). Filament is set in an 18" diameter solid heavy duty plastic molded block. 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 56505921 or call 800-277-3780 to specify***). Fits Nilfisk Advance scrubbers and buffers including Galaxie 20, MP-20 HS, Matador 20 Series, Mobilmatic 20, Whirlamatic 200, Pacemaker 20, Pacemaker P20E, Matador 20, Hydro-Retriever 200, 200HD, Convertamatic 20B, 20E, 200B, 200LX, 200BD, 200E, 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 56505058, 505058. Our Part Number AD 56505058