Boat owners, this LIBRA guide light set is a game-changer for your trailer! These LED lights are specifically designed to fit standard 2-inch PVC guide posts (that's 2-3/8\ OD if you want to get technical) on your boat, ski, or fishing trailer. The installation is seriously easy - no more cutting your posts and trying to glue them back together! They're completely submersible and marine-grade, so you don't have to panic if they take a dip during launching or loading. The advanced SMD LEDs are way brighter and longer-lasting than regular LEDs, giving you full tail, turn, and brake functions. They're officially DOT/SAE/STI approved and run on 12V, so you know they meet all the safety standards. The kit comes with everything you need: two high-visibility 10-LED lights, two 10-foot wire harnesses, wire clips, snap-on connectors, heat shrink connectors, and stainless screws. I've installed these on my own trailer and the difference in visibility is incredible - especially during those early morning or late evening trips to the ramp. The build quality feels solid, like they can handle the bouncing down rough roads to your favorite fishing spot. Whether you're backing down a dark boat ramp or driving on busy highways, these lights make your trailer much more visible and safer. They've held up through rain, splashing, and even being fully submerged without any issues. If you want to upgrade your trailer lighting without the headache of complicated installation, this set is absolutely worth it. Your boat deserves the best protection, and these lights deliver exactly that!