HIGH QUALITY MATERIAL: Make of quality ABS material. environment friendly and non-toxic. make you have a better life..EASY TO USE: the white panel can be freely detached, very convenient to clean and maintain..EASY TO INSTALLATION: available for wall mounted or ceiling mounted. make easy to install in home or other inside/outside places..SIDE: Diameter of 3 Inch, stylish design, ideal for room exhaust and ventilation use..WHAT YOU GET: The HG POWER air vents has modern design and good looking. We have worriless 12-month and friendly customer service.If there exist any problems, please feel free to contact us. we will reply immediately in 24 hours.