Curt 45148 Towing Wiring Fits trailer hitches with a 1 1/4" x 1 1/4" receiver tube opening Factory-torqued trailer ball accepts 2" couplers USA-made ball mount is CNC-formed and robotically welded for a perfect fit 2 5/8" rise or 3 1/4" drop for precise trailer leveling 1/2" hitch pin fits any 1 1/4" x 1 1/4" receiver tube