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 from the gooseneck ball to the kingpin plate.Towing capacity is 20, 000 lbs.GVW with a tongue weight rating of 4, 000 lbs.Features include 360-degree cushioned movement plus vertical articulation, a coupler that accepts a padlock, and installation without drilling or welding.Designed for compatibility with standard camper, RV, and trailer kingpin boxes.Not compatible with trucks having beds shorter than 6 feet or cushioned-style kingpin boxes.Compatible with models using OE numbers matching those listed for this part.