AD 56505753 11" .018"/500 Dyna-Scrub Light Grit Disc Rotary Scrub Brush for Nilfisk Advance Scrubbers. Our lightest grit scrub brush for light to moderate soils. Great for light to medium scrubbing and top cleaning of sealed or unsealed concrete flooring or even marble and quarry tile, slate, VCT and terrazzo flooring surfaces. Can also be used for scrubbing tile with grout lines less than 1/2" in width. 500 grit brushes can also be used for spray buffing tile flooring. Replaces white or red floor pads. .018" diameter Tynex-A or Hahls Nylon filament impregnated with the small 500 grit silicon carbide granules. Equivalent to AgLite Grit, Dyna-Scrub and Mal-Grit Lite (Usually light gray, light green or red in color). Filament is set in an 11" diameter solid heavy duty plastic molded block. Includes 3 mounting drive lugs. Fits Nilfisk Advance scrubbers including Adgressor 3520 (with 35" disc scrub deck), BR 950S, Advenger 2400D, Advenger BR 650S, 1700, 2067, Convertamatic 24D-C, X24D-C, 240, HydroRetriever 240, Trac 240, 240HD, 240LX, 240HR, and 4500 These brushes have a 5-1/2" center hole. Many machines require two, or in some cases, 3 or 4 brushes. Please check your machine before ordering. Often listed as 12". Replaces Nilfisk-Advance 56505753, 505753. Our Part Number AD 56505753