Radial Bristle Brush, Bristle Type Type A, Product Type Radial Bristle Brush, Bristle Material Ceramic, Brush Dia. 6 in, Grit 50, Face Width 1/2 in, Bristle Diameter 6 in, Bristle Length Not Applicable, Compatible Tool Type Bench Grinder, Pedestal Grinder, Primary Material Application Aluminum, Brass, Bronze, Cast Iron, Stainless Steel, Steel, Connector Type Unthreaded Hole, Connector Size 1 in, Operating Speed - Maximum 6,000 RPM, Shank Length Not Applicable, Color Green This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause cancer. -