This beautiful nautical instrument is made from the finest materials, and is at home in any marine environment. * Water proof and corrosion proof: This unit is waterproof with double seals on the front and back of the unit and can be submersed in 300mm of water for 3 months and includes a lifetime warranty against corrosion. * The manufacturing process includes double plating: Physical Vapor Deposition (PVD) Zirconium plating over Chromium plating. Zirconium is a metal which has a high hardness and melting point. It is corrosion resistant, and will never tarnish, discolor or scratch. The surface of Zirconium Coating has the color of brass, with a mirror, hand polished finish. The aluminous dial is suitable for various weather harsh conditions. * High quality stainless steel mounting screws with PVD Zirconium plating are included. All fasteners are made of stainless steel, suitable for salt water environments. * Includes mounting screws. Optional plaques and bases available.