[Product Type]: Square air return grille cover, is designed to improve air ventilation, white color. [Durable Material]: The air vent cover is made of aluminum alloy material, wear resistant, sturdy and durable to use. [Ventilation Cover]: The weatherproof air vent louver has encrypted mesh grids on the back, blocking external debris while allowing air to pass through. [Easy Installation]: The air return grill cover is easy to install, suitable for wall or ceiling mounting. [Wide Applications]: The air vent grille is suitable for the home, bathroom, office, kitchen, garages, RVs, campers, etc. Specification: Material: aluminum alloy Product Size: (Optional) 15cm: Panel size: 15cmx15cm or 5.91inchx5.91inch, Inner diameter size: 12cmx12cm or 4.72inchx4.72inch 20cm: Panel size: 20cmx20cm or 7.87inchx7.87inch, Inner diameter size: 17cmx17cm or 6.69inchx6.69inch 25cm: Panel size: 25cmx25cm or 9.84inchx9.84inch, Inner diameter size: 22cmx22cm or 8.66inchx8.66inch 30cm: Panel size: 30cmx30cm or 11.81inchx11.81inch, Inner diameter size: 27cmx27cm or 10.63inchx10.63inch Package Includes: 1 Air Vent Cover Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.