GN1 is a Self Latching gooseneck Trailer Coupler with a 4 inch round trailer stem.
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Gooseneck Coupler and Stem by PopUp Towing Products. The replacement 2-5/16” Gooseneck Premium coupler and stem self latches and releases remotely with a cable that can be conveniently located near your trailer jack handle.The gooseneck trailer stem is 4" round double wall high tensile steel tubing.
It has a molded hitching guide for easy coupling. The gooseneck coupler is precision cast of Chrome Vanadium Steel; Stainless steel latching pin; Stainless steel spring; powder coated Black. The coupler & stem comes with all necessary hardware and coupler release cabling. Easy and simple to install, remove your old stem and simply replace it.