Construction: It is made of Stainless Steel. It has a Mirror finish, corrosion resistance, and durability for long-term service. Useful Design: It is designed to cover wall or ceiling openings and ducting vents, and to allow a flush surface at the vent area reducing damage to the vent as well as mooring lines, fishing lines and for better airflow control, quiet lever. Easy Use: Easy to install, convenient to use. Suitable for related vents in boats, marine, yachts, caravans, and homes. Dimensions: Slots: 5, Length: 12-7/8 inches, Width: 4-3/8 inches, Height: 1-1/2 inches. Package Includes Pack of 2 MARINE CITY Stainless Steel 5 Slots Louvered Vent for Boats.