Extender Ball for Hida-A-Goose Gooseneck Hitch Head - If you need a little more space between the cab of the truck and your gooseneck trailer, this heavy-duty gooseneck extension is for you, it will give you 5 extra inches of space. Simply remove the gooseneck ball from the Hide-A-Goose, under-bed hitch and slide in the extension. Extension is 5 inches from center of the square hole on gooseneck to center of ball. Ball diameter is 2-5/16 inches. Shank diameter is 2-5/8 inches. Load Capacity: 20,000 lbs GTW / 5,000 lbs TW. Will work with a number of the Hide-A-Goose Gooseneck hitch heads. Please give us a call and we will be happy to help you find out if it will work with your particular hitch.