Questions for B&W Tow & Stow Adjustable Dual-Ball Mount -2" Receiver - 2", 2 5/16" Ball - 3" Drop

here is the Tri ball option https://www.sharptruck.com/bw-tow-stow-adjustable-tri-ball-mount-2-in-receiver-1-78-in-2-in-2-516-in-ball-3-in-drop-35-in-rise

You do need to know his receiver hitch size. There is a picture on that page showing how measure that. https://www.sharptruck.com/bw-hitches-ts10033b. You would also want to know how much drop is needed. There is a diagram of that as well.