100mm Adjustable Ventilation Grille Round Air Vent Ø100mm 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. Product Description Ventilation Grille Ideal for all dryer vent pipes/hose, bathroom vents and sliders, air conditioning systems, kitchen fans and sliders, all household wall vents, heat transfer and ventilation systems, extractor hoods and a variety of other appliances for industrial applications. The vent cover made of high quality ABS plastic, the panel and the duct part are detachable, very convenient for cleaning daily. Easily installed on the ceiling or sidewall Installed as an air inlet or outlet, the exhaust hood must cover the ventilation system to prevent rodents and insects from entering the house. This wall inlet has a grille protection and can rotate the knob to adjust the airflow. Quality Materials Ventilation holes are made of high-quality ABS. And we have exhaust holes of different sizes for customers to choose from. Airflow Is Adjustable Adjustable panel, you can adjust the airflow by rotating the knob. The panel can be completely closed. Easy to Install and Clean The black sleeve is detachable, easy to clean and maintain. Wall or ceiling mounted, perfect for bathroom, office, room exhaust and ventilation use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.