Reese Towpower 21141 Adjustable Ball MountClass III, fits ball diameter 1" length x 13 1 2". For use with 2" x 2" hitch receiver. Features designed to make towing more convenient. 3" to 7 1 2" drop 1 3 4" to 6 1 4" rise Capacity gvwr 5000 lbs Tongue capacity 500 lb Class III, fits ball diameter 1" length x 13 1 2" For use with 2" x 2" hitch receiver Features designed to make towing more convenient.