Surface-Conditioning Disc, Abrasive Type Non-Woven, Abrasive Material Aluminum Oxide, Backing Material Not Applicable, Backing Weight Not Applicable, Coating Coverage Open, Grade Medium, Grit Not Applicable, Overall Diameter 4 in, Quick Change System TR, Series SC-DR, Maximum Operating Speed 12, 000 RPM, Resistance Properties Load, Color Maroon. This item has been restricted from sale in the following state (s): []