Made from durable ABS plastic, these round air vents are anti-corrosion and anti-condensation. You can rotate the vent panel to control the airflow. The convenient design is easy to install and remove, and the black color is dirt-resistant. Select a suitable location on the ceiling, wall, or duct, ensure the surface is clean, and securely install the vent cover. Rotate the vent panel to control airflow. Before purchasing, ensure the size of the hole on the wall and ceiling or your duct matches the air vent. Regularly inspect and clean the air vent to maintain optimal performance.