Fiber Disc, Abrasive Type Coated, Abrasive Material Ceramic, Backing Material Fiber, Backing Weight Not Applicable, Grit 60, Overall Diameter 7 in, Series 987C, Coating Coverage Closed, Maximum Operating Speed 8,600 RPM, Resistance Properties Tear, Connector Size 5/8 In.-11, Connector Type GL, Color Orange, Features Self-Lubricating Grinding Aid, Grade Not Applicable