Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Coarse Backing Plate Material Fiberglass Connector Size 7/8 in Connector Type Unthreaded Hole Density Rating High Flap Disc Type Type 27 Overall Diameter 5 in Series Gemini R766 Backing Material Cotton Backing Weight X Grit P60 Maximum Operating Speed 12 000 RPM Color Blue