3M 07546 Scotch-Brite Roloc Brake Hub Cleaning Disc, 07546, 1-1/2 in x 5/8 in S XCS, 10 discs per box 3M is a diversified technology company serving customers and communities with innovative products and services. 3M is committed to actively contributing to sustainable development through environmental protection, social responsibility and economic progress. The Brake Hub (Wheel Bearing Hub) cleaning products are specifically designed to remove rust and corrosion from the various metal surfaces that interface in disc brake applications. Color: Purple 3M 07546 Scotch-Brite Roloc Brake Hub Cleaning Disc, 07546, 1-1/2 in x 5/8 in S XCS, 10 discs per box features: Abrasive Mineral Type: Ceramic Aluminum Oxide Center Hole Diameter: 5/8 Diameter: 1 1/2 Inch Color: Purple Maximum Operating Speed: 20000 Mineral Grade: XCS