Standard Pack = 1 piece(s). Color and Bond = Gray Vitrified ; Diameter = 12 IN ; Grit Size = 60 IN ; Hardness = J ; Hole Size = 5 IN ; Material = Aluminum Oxide ; RPM = 2228 ; Size = 12 IN x 1 IN x 5 IN ; Standard Package = 2 ; Thickness = 1 IN ; Wheel Type = Type 1 ;