Trailer Dolly with 2-5/16? Ball, 5000 lbs Tongue Weight Heavy Duty. 20000 lbs Load Trailer Mover Dolly Lockable Swivel Casters, Adjustable Height for Moving Trailers, Boat, Camper, Jet Skis, RV New in Box. Stock photos used for representational purposes only—actual item may vary slightly from images shown. SKU: 22