100mm Ventilation Mouth. Made of ABS plastic. With protective grille. Detachable black tube, easy to clean. Ideal for ventilation and evacuation. Product Description Venting Mouth Ideal for all ventilation pipes / pipes of clothes dryers, ventilation openings and pull-outs for bathrooms, air conditioning systems, kitchen fans and pull-outs, all wall ventilation openings for households, heat transfer and ventilation systems , extractor hoods and a variety of other appliances for industrial applications. High quality ABS plastic vent cover, mosquito net is detachable, very convenient for daily cleaning. Easily install from ceiling or sidewall. Unrestricted airflow for your ventilation system - louvers spaced 45 apart to provide maximum airflow. Installed as an air inlet or outlet, the exhaust hood must cover the ventilation system to prevent rodents and insects from entering the house. Quality Materials Hon&Guan ventilation holes are made of high quality ABS. And we have different size exhaust holes for customers to choose. With Protective Grille The ventilation outlet has a fine mesh to prevent mouse birds from blowing out. 'enter your home and a shutters to prevent rain and unwanted drafts. 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.