Solar-Powered LED Light: A solar-powered LED light is mounted on top of the boat trailer guide post. Turn on the switch for steady-on lighting. With a 1000 mAh AA high-capacity battery, one day of charging provides 4–6 hours of continuous light, keeping your guide-ons clearly visible at night to alert approaching vehicles and make your trailer easier to spot Adjustable Width Guide: With adjustable width, the trailer guide-on can expand up to 11.8 in / 300 mm on each side, providing a wide fit for various boat types, including ski boats, sailboats, and fishing boats. This ensures your boat stays in the ideal position for quick and smooth loading 46 in Raised PVC Guide-On: The boat trailer bunk guide has an overall height of 46 in / 1175 mm, mounts visibly on the trailer as a clear guide, and the PVC round tube design helps reduce scratches and scuffs to the hull during transport. Keeps your boat securely positioned even on bumpy road Durable Steel Frame: Crafted with thick, high-quality steel, this boat guide rail is built to handle heavy impacts without warping or bending. Its durable design ensures years of reliable service, providing stable support for your boat throughout loading and transport