Material: This round air grille ventilation cover is made of 304 stainless steel. Diameter: ø150mm / 6", for all types of domestic and industrial ventilation. Insect-proof: The improved, thickened version with insect-proof mesh effectively prevents insects and birds from entering. Weather-resistant: Our ventilation cover is designed with a hemispherical hood. Windproof and rainproof. Easy to install and durable. Application: Ideal for all dryer vent pipes/hose, bathroom vents and extractors, as well as a wide variety of industrial uses.