AD 56505055 17" .065/46 Super Grit Scrub Brush for Nilfisk Advance Floor Machines. A 15" diameter block with aggressive .065" diameter DuPont Tynex-A or Hahls filaments imbedded with large 46 grit silicon carbide granules. This is the most aggressive stripping brush in this series. This brush is designed for heavy duty stripping and scrubbing. Includes riser plate and 47 series clutch plate. These fit most 17" floor machines including, Convertamatic 17B-2, Convertamatic 17B, Matador 17, Matador 17AP, Matador 17APJ, Matador 17HD, Matador 17HS, Matador 17S, Micromatic 17B, Micromatic M17B, Micromatic M17E, Mobilmatic 17, Mobilmatic 17B/1B-5, Pacemaker 17, Pacesetter 17, Pacesetter 17HD, Pacesetter 170, Pacesetter 170HD, SelectLine 17, SelectLine 17HD, SelectLine 17TS, KF17SL-SelectLine 17, KF17SL2-SelectLine 17TS, KF174SL-SelectLine 17, SelectScrub 17, Shadow 17, Shadow 17 Two Speed, Spin 17, and Twin Spin 17. Some models may require the 92 series clutch plate. Please check your model or existing pad driver/brush for markings on the pad driver before ordering. 47 series clutch plates are listed as "silver series", 92 series clutch plates are listed as gold series. If a 92 series clutch plate is required, please use AD 56505911. One scrub brush required on most units. Priced Each. Listed as Magna Grit 46" Brush in the parts manual. Replaces Nilfisk Advance 56505055. Our Part Number AD 56505055.