Fiber Disc Abrasive Type Coated Abrasive Material Ceramic Backing Material Fiber Backing Weight YY Grit 120 Overall Diameter 7 in Series Predator Coating Coverage Closed Maximum Operating Speed 8 600 RPM Resistance Properties Heat Connector Size 7/8 in Connector Type Unthreaded Hole Color Gray Features Self-Lubricating Grinding Aid Rigid Backing Grade Medium Package Quantity 25