12" to 16" Adjustable height Convert-a-ball Fifth Wheel to Gooseneck Cushioned Trailer Hitch Adapter / Converter Adapter Makes the Fifth Wheel King Pin on the Trailer Work with a Gooseneck Hitch on the Vehicle Towing Capacity: 20,000 lbs. Maximum Tongue Weight: 4,000 lbs. Cushioned 360 degrees, Plus Up & Down Comes Complete with Fail Safe King Pin Adapter