Features Adjustable Airflow: You can adjust the airflow by rotating the middle panel of the vent cover for better exhaust. Space Saving: You can use the vents for wall hanging or ceiling mounting for easy ventilation without taking up too much space. ABS Material: The adjustable vents are made of ABS material with better hardness, which is safe, strong and durable. Simple Installation: Insert the vent directly into the appropriate hole, connect the duct hose to exhaust air, flexible and convenient. Scope of Application: This vent is ideal for family rooms, offices, schools, libraries and other places that need better ventilation. Specification: Item Type: Adjustable Air Vent Material: ABS Scope of Application: Great for family rooms, offices, schools, libraries and other places that need better ventilation. Package List: 1 x Adjustable Air Vent Package List 1 x Adjustable Air Vent