GN3 - 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" square high tensile steel tubing. It has a moulded 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. 24, 000 lb gwr.