B&W TS10065BMP B&W Tow & Stow 2-Ball Mount 2" X 2 5/16" - 4 1/2" Drop - 5 1/ 2" Rise
Amazon.com: Adjustable Trailer Hitch, Fits 2.5 Inch Receiver, 8 Inch Drop Hitch, 18,500 LBS GTW, Aluminum Forged Shank, 2 Inch & 2-5/16 Inch Balls, Towing Hitch for Heavy Duty Truck with Double Lock Pins : Automotive
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