Quick-Change Sanding Disc, Abrasive Type Coated, Abrasive Material Aluminum Oxide, Backing Material Polyester, Backing Weight YF, Coating Coverage Closed, Grade Medium, Grit P100, Overall Diameter 3 in, Quick Change System TR, Series 361F, Maximum Operating Speed 20, 000 RPM, Resistance Properties Heat, Color Blue, Package Quantity 50. This item has been restricted from sale in the following state (s): []