General description Durable round ventilation grille made of 316 stainless steel with a polished surface, ensuring corrosion resistance and long-lasting performance. This adjustable vent allows for customizable air volume to meet your ventilation needs. Technical specifications Diameter: 125 mm (5 inches) Drill holes: 4 holes (3.5 mm) Usage Ideal for extracting air from indoor spaces. Suitable for heating or ventilating boats, mobile homes, or caravans. Can be used indoors and outdoors for grilling purposes. Effective for ventilating garages.