Auto Upholstery Brush 8 1/2" Brown Poly. Quickly clean interior surfaces with the Carpet & Upholstery Brush! The Carpet & Upholstery Brush features 1 3/8" long stiff brown plastic bristles that are set in a polypropylene block with an upturned handle. Brush is trimmed flat. This brush is gentle enough to clean upholstery and floor mats and tough enough to effectively clean tire sidewalls. Use with your favorite cleaner and agitate surfaces to remove soil.