【Function】The ventilation grille is mounted on the outer wall of the air exhaust system. When the fan stops, the slats close automatically and prevent the entry of cold air and the penetration of dirt, insects and other objects. 【High-quality material】This ventilation grille is made of 304 stainless steel, durable, rust-proof and resistant to corrosion. 【Wide Range of Applications】For use in tumble dryer vent pipes and hoses, bathroom vents and extractors, air conditioning units, kitchen fans and vents, electric clothes dryers, cooker hood extractors, conservatory wall outlets and many more, including industrial uses. 【Usage】The item is the wall vent exhaust cover outlet. Stylish and durable air vents, perfect for the modern home. 【Practical】The square wall vent stainless steel with gravity draught excluders, screw fixings, retaining clips and gasket.