Round ventilation grille, adjustable ventilation opening, stainless steel air inlet and outlet

Durable material: Vent made of 316 stainless steel, polished surface, corrosion resistance, sturdy and durable in use. Size: The round vent has a diameter of 125 mm (5 inches), 4 drill holes (3.5 mm), easy to install, and the air volume is adjustable to your needs. Adjustable ventilation: Our supply air can be used to extract air from indoor spaces. Suitable for heating or ventilating a boat, motorhome, or caravan, adjustable ventilation, fresh air exchange as needed. Application: The round ventilation grille can be used both indoors and outdoors for anyone who needs adjustable ventilation, depending on the food being grilled. Garages can also be optimally ventilated with these ventilation rosettes.