Gray and Red Auto Detailing Carpet and Upholstery Poly Brush Stiff red poly fibers provide great scrubbing action helping you clean carpets, upholstery, tires and anywhere you need serious scrubbing. Molded poly block fits nicely in your hand and our crimped fiber helps to clean aggressively. Size 2-1/2"x6". Trim 1.25". Chemical resistant. Brand new high quality product.