24" 24 Single Row Soft Nylon Main Cylinder Scrub Brush for Tennant 7400 Scrubbers. Very soft Nylon filament for light duty scrubbing on sensitive flooring such as freshly painted or epoxy flooring with shiny surfaces. Tennant 7400 requires two brushes. Priced Each. Tennant List Price $526.00 each. Replaces Tennant 71171, Carlisle/Flo-Pac 781245, 36781245