Fitment: for Camper/RV/Trailer kingpin boxes.Not for trucks with beds shorter than 6 feet or cushioned style kingpin boxes.Function: Converts a trailer kingpin to connect to a gooseneck hitch, enabling use of a fifth wheel trailer with a gooseneck hitch.The sliding collar adjusts to any height between 12 inches and 16 inches.Condition: Color: Black Type: Adapter Material: Steel (QT450-10) Towing capacity (GTW): 20, 000 lbs Pin weight capacity: 4, 000 lbs Length: 12 to 16 inches Placement on vehicle: Rear Package size: 33 x 33 x 60 cm Package weight: 28 kg Package includes: 1 x Gooseneck adapter, coupler locks with padlock Features: Cushioned 360-degree rotation plus vertical movement; steel construction; reduces bounce and vibration; interior polyurethane cushions act as shock absorbers; minimizes wear on both trailer and vehicle; adjustable height for multiple applications Installation: Includes a hole in the base for padlock use; no drilling or welding required; fully tested under extreme conditions for stable function and