TN 1201926 31" 18SR Stiff Poly Cylinder Scrub Brush for Tennant T12 Riding Floor Scrubbers. A stiffer version of the standard poly (TN 1201572). This stiff poly brush uses a larger diameter .036" polypropylene for heavier duty scrubbing jobs on unsealed concrete, sealed concrete, polished concrete, tile, vinyl, terrazzo, etc. Commonly listed as the grout brush. 18 single row high density configuration. These brushes have an extra row of filament at the ends for solution control. Fits Tennant T12 riding scrubbers. (Cylinder Brush Models Only - for disc brushes, use our TN 1042500, 16" diameter stiff poly). Splined Drive. Two brushes are required per model. Priced per brush. Replaces Tennant 1021927. Our Part Number TN 1201927