TN 386240 40" 20 Single Row .065 Heavy Grit Abrasive Bristle Cylinder Scrub Brush for Tennant M17, T17, 7300 & 8300 Max Pro 1000 Series Scrubbers - 39/40" Models. Super abrasive DuPont Tynex-A or Hahls Nylon filaments are impregnated with 80 grit silicon carbide granules for heavy duty stripping/scrubbing jobs. For aggressive cleaning on unsealed and sealed flooring with heavy dirt and debris. Most models require two cylinder scrub brushes. Some of these models can also take disc scrub brushes instead of cylinder brushes. Please check your models before ordering. Priced Each. Not manufactrued by the Tennant Company. Replaces Tennant 386240. Our Part Number TN 386240