(2) black nickel mini humbucker rings for Firebird® style guitar and similar applications. Outside measurements are 3-7/16" x 1-1/2". Inside measurements are 2-11/16" x 1-1/8". Pickup mounting screw spacing is 2-15/16". Ring mounting screw spacing is 3-3/32"(78mm) x 1-3/16"(30mm). Includes mounting screws.