Precision Surface-Conditioning Disc, Abrasive Type Non-Woven, Abrasive Material Ceramic, Backing Material Not Applicable, Backing Weight Not Applicable, Coating Coverage Not Applicable, Grade Coarse, Grit Not Applicable, Overall Diameter 3/4 in, Quick Change System TR, Series PN-DR, Maximum Operating Speed 30,000 RPM, Color Brown, Package Quantity 50