200mm Adjustable Ventilation Grille. Made of ABS plastic. Adjustable air inlet by turning the knob. Detachable black tube, easy to clean. Ideal for ventilation and exhaust. Suitable for clothes dryer ventilation pipes, bathroom ventilation openings, air conditioning systems, kitchen fans, wall ventilation openings, heat transfer systems, extractor hoods, and various industrial applications. High quality ABS plastic construction; vent cover, panel, and duct are detachable for easy cleaning. Can be installed on ceiling or sidewall. Functions as an air inlet or outlet; helps prevent rodents and insects from entering through ventilation openings. Features a grille guard and adjustable knob for controlling airflow. Ventilation hole made of high quality ABS material; available in multiple sizes. Adjustable panel allows control of airflow by rotating the knob; panel can be fully closed. Detachable black sleeve enables easy cleaning and maintenance. Suitable for wall or ceiling mounting; ideal for use in bathrooms, offices, rooms requiring ventilation or air extraction.