The CURT coil-spring gooseneck pin box is engineered for RV owners who demand more from their towing setup — more ride comfort, more truck bed space, and more long-term durability. By utilizing a gooseneck connection, this pin box gives you full use of your truck bed without sacrificing performance or stability. At the heart of the system is CURT’s proprietary coil and shock technology, designed to dramatically reduce the bumps, jolts, and vibrations that come with towing. Compared to traditional pin boxes, the Helux pin box cuts down on force to your RV frame and body by up to 30% compared to other gooseneck pin boxes. With the Helux, you’ll feel the difference right away. The automotive-grade coil spring absorbs road shock to deliver a smoother, quieter ride for both pets and passengers. And unlike airbag-style pin boxes, the Helux is virtually maintenance-free. No compressors. No adjustments. No break-in period. Just install it and tow. Built to handle serious loads, this pin box offers a 20,000-lb. gross trailer weight rating with a pin weight range from 1,350 to 2,350 lbs. The auto-latching coupler connects quickly to any standard 2-5/16” gooseneck ball, making hookups fast, easy, and secure. It’s also built to last. The CURT coil-spring gooseneck pin box features high-strength steel construction, a durable black powder coat finish, and has been rigorously tested to SAE J2638 standards for safety and reliability. Plus, it’s compatible with Rhino Box bolt patterns and approved for use on Lippert RV frames, so it won’t void your manufacturer warranty. This Helux pin box is compatible with #23082, #23503, #23520, #23522, #23523, and #23546 CURT locks.