This unit is water resistant with seals on the front and back of the unit and includes a 5 year 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 chrome, 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.