Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Extra Coarse Backing Plate Material Fiberglass Connector Size 7/8 in Connector Type Unthreaded Hole Density Rating High Flap Disc Type Type 27 Overall Diameter 6 in Series Gemini R766 Backing Material Cotton Backing Weight X Grit P40 Maximum Operating Speed 10 200 RPM Color Blue