TowSmart Class 2 Up to 6,000 lb. 1-7/8 in. and 2 in. Ball Diameters Dual Adjustable Trailer Hitch Ball Mount 726 - The Home Depot
Amazon.com: CROSSHIP Adjustable Trailer Hitch Ball Mount - Fits 2'' Receiver, 6Inch Drop/Rise Drop Hitch with 2'' & 2-5/16'' Solid Dual Balls 25,000 lbs Capacity- Tow Hitch for Heavy Duty Truck with