Adjustable air volume: This ceiling air supply vent grille cover features adjustable air volume, allowing you to easily control the airflow in your space. Made of high-quality ABS material: Crafted from durable ABS material, this vent grille cover is built to last and withstand daily use. Easy to install and secure: With its easy installation process, this vent grille cover can be quickly mounted and is designed to stay securely in place. Efficient indoor exhaust and noise reduction: This vent grille cover is suitable for indoor exhaust, effectively reducing noise and improving air circulation. Decorative design: This vent grille cover serves a functional purpose and complements the appearance of your space. Product Name: Air System Outlet Valve Color: White Material: ABS Size: 4 Inch / 6 Inch Package Contents: 1 x Air Vent Louver Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.