Ceramic Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 46 Overall Diameter 8 in Overall Thickness 3/4 in Compatible Tool Type Cylindrical Grinder Surface Grinder Tool and Cutter Grinder Primary Material Applicationn Cast Iron Nickel Alloy Stainless Steel Steel Titanium Specification 3SGP46-JVH Wheel Hardness J Wheel Type Type 1 Maximum Operating Speed 3 600 RPM Series 3SGP Grade Coarse Bond Type Vitrified Color Purple Item Straight Grinding Wheel