Milltrip 1PC Plastic Air Vent Grille Cover - 3 Flaps Wall Duct Ventilation Grill With Net (20 * 20CM)

["Airflow Control : It can keep indoor and outdoor air circulation, suitable for covering ceiling openings and ducting vents.","3 Adjustable Louvers : Reduces 30% dust entry vs standard vents.","No More Buzzing Disturbances : Equipped with fly screen, it opens automatically when the wind blows.","Plastic Construction : This material will not be corroded and very easily cleaned up. You can use it safely for a long time.","Aesthetic Integration : It can be painted to match home's exterior as you want."]