AD 56505454 18" Union Mix Disc Rotary Scrub Brush for Nilfisk Advance Floor Buffers and Scrubbers. Union is a mix of natural tampico and bassine fibers which creates a soft scrub brush. This natural fiber brush can be used on decorative or polished flooring for very light cleaning and "dusting". Union brushes are also commonly used to apply waxes and polishes to wood and concrete flooring. These brushes have limited life as compared to their synthetic counterparts. 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 56505926 or call 800-277-3780 to specify***). Fits Nilfisk Advance scrubbers and buffers including Galaxie 20, MP-20 HS, Mobilmatic 20, Matador 20, All-Purpose Matador 20, High-Speed Matator 20, Whirlamatic 200, Pacemaker 20, Pacemaker P20E, 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 56505454, 505454. Our Part Number AD 56505454