Fitment: Compatible with camper/RV/trailer kingpin boxes.Not for trucks with beds shorter than 6 feet or cushioned-style kingpin boxes. Function: Converts a fifth wheel trailer's kingpin to connect to a gooseneck hitch.Designed for use with model C5G1216.The sliding collar adjusts to any height between 12 inches and 16 inches. Specification: Condition:.Color: Black.Type: Gooseneck 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 and coupler locks with padlock. Features: 360-degree cushioned movement plus vertical adjustment.Steel construction.Interior polyurethane cushions reduce bounce and vibration.Designed to minimize wear on both trailer and vehicle.Adjustable height supports multiple applications. Installation: Includes a hole in the base for padlock use.No drilling or welding required.Tested under extreme conditions for stable function and long-term use.