Unitized Wheel Abrasive Material Silicon Carbide Density Rating Medium (5) Grade Fine Series Bear-Tex Rapid Blend Face Width 1/4 in Maximum Operating Speed 18 000 RPM Overall Diameter 3 in Connector Size 1/4 in Connector Type Unthreaded Hole Quick Change System Not Applicable Abrasive Type Non-Woven Color Gray Grit 220