Gold anodised aluminium. Size is the maximum opening the vent will cover. Easy to fit and great for small spaces, this louvre vent improves airflow and features a gold anodised aluminium finish for a smart, professional installation. The vent covers a maximum opening of 9" x 3". Fixed louvre vent for a higher level of airflow. Surface-mounted design is easy to fit. Made from a robust and durable aluminium. Gold finish for an attractive installation. This vent is designed to cover a maximum opening of 9" x 3".