These fall within the weathertight or watertight classification.
They are built to the customers specifications in polished 316 L stainless steel and can be in the sharp edge or beveled version. The seal is guaranteed by gaskets and labyrinth seals for collection and discharge of water. They are equipped with a lock and a blocking system when in opening position.
They are also available in a version with 12/24 or 220 V automated mechanism and in an emergency escape version.
They can be certified by mayor pertinent Registering Authorities, ( Lloyds Register, Abs, Rina, Det Norske Veritas, e Mca ).