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A Gooseneck Extender (sometimes called a "Flip Box") is an accessory that is used to add length to the
swing clearance of a gooseneck. The most common use for a gooseneck extender is to allow a trailer to connect to a
jeep dolly, but one can also be used to add
swing clearance to a gooseneck for use with a tractor with a longer frame. When not is use, the Gooseneck Extender can be flipped over onto the top of the gooseneck or removed completely.