TN 385913 24" 18 Single Row .050" Grit Abrasive Bristle Cylindrical Main Scrub Brush for Tennant 5400-24C (Cylindrical Brush Models). An aggressive scrub brush for heavy duty stripping and scrubbing of unsealed and sealed concrete flooring with heavy soils. Splined Drive. Two brushes required for TN 5400-24C. Priced Each. Replaces Tennant 385913. Our Part Number TN 385913