Tow Ready 80799 Trailer Tri-Ball Ball Mount. For class III/IV. Fits 2 inch receiver, 1-7/8 inch ball rated at 200 pound tongue, 2000 pound trailer weight, 2 inch ball rated at 1000 pound tongue weight, 10000 pound trailer weight. 2-5/16 inch ball rated at 1600 pound tongue weight, 16000 pound trailer weight without drop. Non extendable, 8 inch solid shank, 1-7/8 inch, 2 inch, 2-5/16 inch chrome balls.