These vents are made from extruded aluminium and have slimline blades on a pitch of 38mm providing excellent resistance from rain whilst providing a 50% free area for airflow. And, fitted as standard on all our vents is a wire mesh to prevent unwelcome visitors. The sizes quoted exclude the flange. For overall flange size add 48mm (24mm per side). Depth of the vent is about 45mm.The flanges are supplied un-punched. To order other vents sizes, please visit our shop. The item "Louvre vents rodent/bird proof ventilation shipping containers 500x500mm £96+VAT" is in sale since Monday, June 25, 2018. This item is in the category "Business, Office & Industrial\Modular & Prefabricated Buildings". The seller is "budgetshippingcontainers-freephone08081234215" and is located in Warwickshire. This item can be shipped to United Kingdom.