Reese Class III/IV Ball Mount 4 Inch Drop, 21345 Class III/IV; Ball Mount; 5000 lb. GTW/500 lb. Tongue Weight; 2 in. Receiver; 1 in. Ball Hole; 11 in. Length; 4 in. Drop; 2.75 in. Rise; Black Finish Reese Reese Class III/IV Ball Mount (Black) - 21345 21345 Trailer Hitch Ball Mount