TN 1220228 / 1018457 13" .065"/46 Grit Abrasive Bristle Disc Scrub Brush for Tennant T7 26" Disc Floor Scrubbers. .065" 46 Grit Tynex-A or Hahls Nylon Bristle with Silicon Carbide. Abrasive bristle brush for heavy scrubbing and stripping. Used on sealed and unsealed flooring. Not recommended for epoxy or painted flooring. Scrub brush block measures 12.5". Most machines require two brushes. Sold Each. Fits Tennant T7 26"/650mm Disc Brush Models and Nobles Speed Scrub Rider 26"/650mm Disc Brush Models. Clutch plate spring wires "clipped" off on 13" brushes. Replaces Tennant Part 1220228 / 1018457. Our Part Number TN 1220228 / 1018457