Depressed Center Wheels, Abrasive Wheel Type Type 27, Abrasive Wheel Diameter 4 1/2 in, Thickness 0.125 in, Arbor Hole Size 7/8 in, Abrasive Material Ceramic, Abrasive Grit 36, Max. RPM 13, 300 RPM, Series Green Corps (TM), Grade Extra Coarse, Application Ferrous Metal, Package Quantity 40. This item has been restricted from sale in the following state (s): []