Fiber Disc Abrasive Type Coated Abrasive Material Aluminum Oxide Backing Material Fiber Backing Weight Not Rated Grit 36 Overall Diameter 4 1/2 in Series V0947 Maximum Operating Speed 11 000 RPM Resistance Properties Tear Connector Size 7/8 in Connector Type Unthreaded Hole Color Brown Grade Extra Coarse Package Quantity 25