Mount 3 locking Mail Boss boxes on a single pole12-gauge galvanized steel constructionBlack powder-coated finishHoles to screw in 3 individual boxesDimensions: 34L x 5W x 2H inches. Mount up to 4 Mail Boss locking boxes on the Mail Boss 3-Box Spreader Bar. This easy attachment provides secure mounting for up to 3 Mail Boss boxes on a single Mail Boss pole.