Quick-Change Sanding Disc, Abrasive Type Coated, Abrasive Material Zirconia Alumina, Backing Material Polyester, Backing Weight Y, Coating Coverage Semi-Open, Grade Coarse, Grit 80, Overall Diameter 4 in, Quick Change System TS, Series BlueFire R860, Maximum Operating Speed 30, 000 RPM, Color Blue, Package Quantity 25. This item has been restricted from sale in the following state (s): []