Installation: Fits your B&W swivel ball or any other hitch with a 2 5/16″ ball. All hardware included – grade 8 mounting bolts, washers and lock nuts. The 7 3/4″ forward offset makes it ideal for short bed trucks. Description: T-built Hitch Adapter Do you have a ball in your truck and are looking for a way to pull a fifth wheel without all the extra hardware in the bed Now you can use this adapter to convert your RV trailer to tow with a gooseneck ball. 20,000 lb. capacity Self-centering locking plate Pocket fits 2-5/16″ ball Coupler can be locked with a padlock Attaches to most standard kingpin boxes Easy installation Which adapter height is right for you The best way to figure out the height you need is to drive your truck under the camper and set the camper to the desired height from the top of the bed (usually 6 to 8 inches). Measure from the top of the ball in the truck to the bottom of the ball plate on the camper, compare this measurement to the measurements below to decide what height is right for your installation. Included: 1*Gooseneck Ball Adapter without Instructions