TN 399229 25" 18 Single Row Soft Nylon Cylindrical Scrub Brush for Tennant Speed Scrub 2601 Scrubbers. A small diameter (.014") Nylon filament for light to general duty scrubbing of smooth or polished concrete with light debris, painted or epoxy painted flooring, or for any sensitive floor which requires a soft brush. Fits Tennant / Nobles Speed Scrub 2601 cylindrical brush model scrubbers. 25" Length, Splined Drive. Two brushes required per unit. Priced Each. Replaces Tennant / Nobles 399229.