Convolute Wheel, Abrasive Material Silicon Carbide, Connector Size 3 in, Density Rating Hard (9), Grade Medium, Series Bear-Tex Series 1000, Face Width 1 in, Maximum Operating Speed 4,500 RPM, Overall Diameter 8 in, Abrasive Type Non-Woven, Coating Coverage Open, Color Gray, Grit 150, Resistance Properties Heat, Smear, Water