AGPtek Anti-corrosion IP68 Waterproof 1/2" NPT 12V 9W Underwater Boat Drain Plug Light for Fishing Swimming Diving - Blue/Red/Green REAL WARTERPROOF and SHOCKPROOF: The shell is made of bronze which has great anticorrosive effect and far better than brass. The shell surface is chrome plated that not only can bright the glossiness but also further enhance corrosion resistance and wear resistance. Its easy to generate a layer of passive film to prevent further corrosion when chrome reacts with seawater.It will not effect by engine movement, so you can use it when cruising. ENERGY SAVING & GOOD LIGHT EFFECT & LONG LIFETIME: High power CREE LED lamps have good luminous flux and efficiency. 120Viewing angle. It adapts newly upgraded thermal conductive packaging technology which makes great heat dissipation effect and extends service life of more than 1 year. HIGH QUALITY: The lights go through shell molding, polishing, electroplating and other procedures. In each procedure, we pick up the best one into the next round of processing. Only 3 lights can finally deliver to our customers in per 5 lights. So, trust our quality!!! WIDE USAGE RANGE: You can use the lights in many ways, such as night fishing, night fishing, lighting up your wave when underway and creating good effect in your boat. CONVENIENCE: Standard "NPT screw is easy to set up. The waterproof joint is good to remove.