【Material】: The ventilation grille is made of high-quality stainless steel, the surface is polished, smooth and textured, with high hardness and durability. 【Size】: The diameter of the stainless steel circular ventilation grille is 95 mm. 【Adjustable ventilation】: Less noise, Our ventilation grille can be used for indoor exhaust. suitable for heating or ventilation of a boat, mobile home or caravan, Adjustable ventilation, change fresh air according to your needs. 【Elegant and easy to clean】: Simple design, fashionable appearance, fine workmanship and excellent quality. Can be perfectly installed on the ceiling or wall, also very easy to disassemble for easy cleaning. 【Multiple Use】: The ventilation grilles are not only suitable for indoor ventilation, but also for RVs, boats, garages, flower sheds, barbecue barrels and any other occasions that require ventilation. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display, there may be