Scotch-Brite(TM) Clean and Strip Rim Wheel, 16 in x 4 in x 3 in 7S XCS, 1 per case Aggressive, open web construction for cleaning welds, removing rust and paint. Layered rim construction. Hard, long lasting 7 density. Abrasive mineral: Extra coarse grade silicon carbide. Color: Black MOS: 2250 RPM