General description Made of durable ABS material, this set of 8 adjustable round air vent soffit exhaust fans is compact and solid. They are designed for easy installation and can be mounted on walls or ceilings. The vents are adjustable, allowing you to rotate them to change the airflow as needed. Additionally, the white panel is detachable, making it convenient for daily cleaning and maintenance. Technical specifications Material: ABS Color: Black and White Size: Diameter 148mm, Bottom Diameter 92mm, Height 72mm Package Contents: 8 x Air Vent Grilles Measurement allowed error: +/- 1-3 cm