Standard Pack = 1 piece(s). Color and Bond = Gray Vitrified ; Diameter = 7 IN ; Grit = 46 ; Hardness = I ; Hole Size = 1 1/4 IN ; Material = Aluminum Oxide ; RPM = 3600 ; Size = 7 IN x 3/4 IN x 1 1/4 IN ; Thickness = 3/4 IN ; Wheel Type = Type 1 ;