We have multiple 2-5/16" gooseneck hitch balls that will work to install the Demco Recon Gooseneck-to-5th Wheel Trailer Hitch Adapter # DM8550045.
The correct gooseneck hitch ball will be dependent on which gooseneck hitch you have installed on your truck.
I recommend getting the brand and model of gooseneck hitch you have from the hitch itself, and with that information I would be happy to recommend the correct hitch ball for your. I also included a link to all of our 2-5/16" gooseneck... view full answer...