Curt Manufacturing 45030 Black Towing Wiring Fits trailer hitches with a 2" x 2" receiver tube opening Equipped with a 1" hole to accept a trailer ball shank 3/4" rise or 2" drop for precise trailer leveling Hollow shank weighs less and can be used with an anti-rattle kit CNC-formed, robotically welded and mechanically descaled for a perfect fit