The AP03 12" to 16" Adjustable Cushioned 5th-Wheel-to-Gooseneck Adapter with Chain converts a trailer's kingpin for use with a gooseneck hitch.The sliding collar with set screws allows height adjustment between 12 inches and 16 inches.It has a towing capacity of 20, 000 lbs.GVW and a tongue weight capacity of 4, 000 lbs.The coupler features a 360-degree cushioned rotation plus vertical movement and locks with a padlock.Installation requires no drilling or welding.The adapter is designed for use with standard kingpin boxes on campers, RVs, and trailers.It is not compatible with trucks having beds shorter than 6 feet or with cushioned-style kingpin boxes.Compatible with models using the OE number C5G1216.