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 to Use: Easy to install, convenient to use, suitable for related vents in boats, marine, yachts, caravans, and homes. Dimensions: Slots: 8, Length: 16-13/16 inch, Width: 3 inch, Height: 1-1/4 inch. Package Includes Pack of 1 MARINE CITY 304 Grade Stainless Steel 8 Slots Louvered Vent for Boats.