Fuliko Vent 4" White Plastic Air Vent Cover – Pack of 10 – Circular Louvered Duct Register with Flange and Built-in Screen –

material: Louvre air vents are made of new , light in , plastic, environment friendly and . Built-in fly screen . No screws included. Installation options available for wall or ceiling . Can be connected to dryer vents or any other HVAC vent component Diameter for 4" Inch Opening: Outer diameter is 5.24" for room exhaust and ventilation use. Great and beautiful design. dust into kitchen, bathroom or any other room by fly screen . Air vent deflector for airflow improvement For or exhaust use, for outside or inside, for walls or ceilings, great for garages, sheds, offices, bathrooms, RVs or campers, and anywhere else air is desired to travel through.