AP03 C5G1216 Adjustable Cushioned 5th Wheel to Gooseneck Adapter w/ Chain 20000 lb This adapter converts a trailer's kingpin to connect to a gooseneck hitch.The sliding collar with set screws allows height adjustment between 12 inches and 16 inches from the of the gooseneck ball to the kingpin plate.It supports a towing capacity of 20, 000 lbs GVW and a tongue weight of 4, 000 lbs.The design includes a cushioned 360-degree swivel with vertical movement to reduce stress during towing.The coupler can be secured with a padlock for added security.No drilling or welding is required for installation.The fully adjustable body minimizes wear and tear on both the trailer and vehicle.This adapter is compatible with standard camper, RV, and trailer kingpin boxes.It is not suitable for trucks with bed lengths under 6 feet or for use with cushioned style kingpin boxes.The product has been tested for stable performance and under regular use.