Scotch-Brite(TM) Light Deburring Wheel, 6 in x 2 in x 1 in 8S FIN, 2 per case Designed for deburring and finishing. Convolutely wound on a core. Hard and durable 8 density for aggressive edge deburring. Abrasive mineral: Fine grade silicon carbide. Color: Gray MOS: 6000 RPM