Unitized Wheel Abrasive Material Aluminum Oxide Density Rating Hard (8) Grade Medium Series Bear-Tex Rapid Blend NEX Face Width 1 in Maximum Operating Speed 30 000 RPM Overall Diameter 1 in Connector Size 3/16 in Connector Type Unthreaded Hole Quick Change System Not Applicable Abrasive Type Non-Woven Color Brown Resistance Properties Smear Package Quantity 50