The detail-oriented, high sensitivity Nautilus Barometer is designed to function extremely well in punishing saltwater environments. Uniquely constructed, this remarkable piece is waterproof at up to three feet for 30 minutes. The highly sensitive all-metal aneroid movements have an expanded scale for detection of the slightest variation in weather movements. This highly capable barometer features an anodized aluminum dial that has been laser-engraved for precision and appeal. The glass crystal center is securely nestled in its O-ring seat for defense against vibration, impact, and thermal expansion. It"s surrounded by durable moveable markers crafted from UV-stabilized polycarbonate. Part of the state-of-the-art Nautilus Collection, this precision instrument boasts a low-glare, satin black case constructed from color anodized and sealed solid aluminum, ensuring that the finish will not peel, bubble, or tarnish. All fasteners are stainless steel. This barometer comes complete with instructions. About Weems & Plath Founded in 1928, Weems & Plath is a company steeped in the rich tradition of navigation. They offer a wide spectrum of precision instruments ranging from brass nautical clocks and barometers to binoculars and children"s books. The company"s dedication to providing the highest quality possible is evident in every step of the building process. From development to production, Weems & Plath strives to be meticulous and offer exceptional service. The rich history and high standards of Weems & Plath will carry on into the future. * Dimensions: 5.88H x 5.88W x 2.5D inches * Crafted from color anodized and sealed solid aluminum * Glass crystal in a double O-ring seat for protection * Hydrophobic filter allows air in but resists water