Upgrade your gooseneck trailer with the PopUp 4″ Square Straight Coupler with King Pin • GN7, a versatile coupling solution that allows you to tow your trailer with ease using a semi-tractor or pickup mounted fifth wheel. With a simple swap of the coupler to a king pin, you can seamlessly transition between different towing setups. The 2 Inch SAE king pin included meets industry standards and is ideal for various over-the-road applications.

– Designed for trailers with 4-inch ID round tube
– Standard S.A.E. king-pin with 10-inch round bolster plate fitted to 18-inch long square or round tube
– Durable black powder coat finish for enhanced longevity
– Fits standard gooseneck trailer coupler tubes for easy compatibility
– Features 1-inch holes through both sides for secure attachment
– Comes with a limited lifetime warranty for added peace of mind