Description Material: This round air grille vent cover is made of 304 stainless steel. Diameter: 150mm / 6", for all types of domestic and industrial ventilation. Insect-proof: The improved version, thickened, with an insect-proof mesh effectively prevents insects and mouse birds from entering. Weatherproof: Our ventilation cover is designed with a hemispherical hood. Windproof and rainproof. Easy to install and durable. Application: Ideal for all dryer vent hoses/pipes, bathroom air vents and extractors, as well as a wide variety of industrial uses.