General description The AlwaysH Round Ventilation Grille is designed for both indoor and outdoor use, providing adjustable ventilation to meet your specific needs. Made from durable 316 stainless steel with a polished surface, this air vent is resistant to corrosion and built to last. It is suitable for various applications, including heating and ventilation in boats, mobile homes, caravans, and garages. Technical specifications Diameter: 125mm (5 inches) Drilling holes: 4 holes (3.5mm) Installation Easy to install with 4 drilling holes Usage Adjustable air volume for incoming air and indoor exhaustion Can be used for ventilation in boats, mobile homes, caravans, and garages