General description This round ventilation grille is made of 304 stainless steel and features a diameter of ø100 mm / 4". It is suitable for all types of domestic and industrial ventilation applications. The improved and thickened version includes insect-proof mesh to effectively prevent insects and birds from entering. Technical specifications Material: 304 stainless steel Diameter: ø100 mm / 4" Other information Weatherproof design with a hemispherical shell, making it windproof and rainproof Easy to install and durable Application: Ideal for dryer vent pipes/tubes, bathroom vents and extractors, and various industrial uses