Silicon Carbide, Connector Size 1 in, Connector Type Unthreaded Hole, Grit 120, Overall Diameter 8 in, Overall Thickness 1 in, Compatible Tool Type Bench Grinder, Pedestal Grinder, Primary Material Applicationn Aluminum, Brass, Bronze, Cast Iron, Copper, Masonry, Natural Stone, Stainless Steel, Titanium, Wheel Hardness Not Rated, Wheel Type Type 1, Maximum Operating Speed 3,600 RPM, Reducer Bushing Size 5/8 in, 3/4 in, 7/8 in, Series 39C, Grade Extra Fine, Bond Type Vitrified, Color Green