Designed to easily fit on motor boats and meet the strict requirements for recreational boats operating between sunset and sunrise. Aqua Signal Series 20 Navigation Lights are made for powerboats up to 39 (12m) in length. The screens are made from brushed stainless steel so they will last longer and wont corrode due to seawater. With housing built from high-quality polycarbonate, these lights are impact and shock resistant. Optics comes with a computer designed fresnel lens system that eliminates glare and impact and high-quality, impact and shock resistant plastic for longevity. Key Features Housing cases are made from glass-reinforced polycarbonate for durability Housing is non-corrosive, non-magnetic and seawater resistant Optic casings are made from high-quality, impact and shock resistant plastic for toughness Comes with self-adhesive gasket and special dowel included mounting hardware All lights come with a protection rating of IP45 and are USCG approved For more information regarding Aqua Signal Series 20 Navigation Lights, please refer to the Series 20 Data Sheet.