Tennant 399244 Medium Poly 16" Scrub Brush for Tennant Alpha A5, T5, T5e and Nobles Speed Scrub 24-32 inch 32 inch/800mm Disc Model Scrubbers. Durable polypropylene scrub brushes are perfect for general duty scrubbing. Includes drive plate. Tennant A5, T5, SS series take different diameter disc scrub brushes