Packaging and Size: each package includes 24 stainless steel air outlet vents, making it an efficient investement for extensive usage; Each vent measures 4 inches/100mm in plane and 149.85cm in size, fitting seamlessly into your home's structure without being disruptive Material and Elegance: these air outlet vents stand the test of time, courtesy of their durable stainless steel construction; Their black color exudes a classic appeal, making these vents a perfect match for any home decor style; With their fine craftsmanship and simple style, these vents not only functional but also stylish Well-designed Structure: the round soffit vents are thoughtfully designed with a round flat cover with louvers, striking a balance between aesthetics and functionality; These vents are waterproof and anti-rust, featuring an inclined louver at 45 degrees; The built-in screen mesh keeps unwanted elements from entering your home; Please handle with care due to the peaked edges Versatile Installation: the louvered vents are easy to install; For customization, just adjust the regulating valve of the round louver grille cover; You can install these vents on either the ceiling or wall as per your needs; Install these vents on an external wall to keep indoor air circulated and in a corridor to save space Great Compatibility: these wall vents are a one-stop solution for various applications; They are suitable for bathroom and kitchen fans, air conditioner, gas vents, and most other wall vents; They fit perfectly with most round hoses having a diameter of 4 inches, making the installation and removal process effortless Features: Waterproof and anti-rust Experience a breath of fresh air with these innovative stainless steel air outlet vents, designed to elevate the essence of your homes or workspaces dramatically. These vents, characterized by their round flat cover with louvers, are designed to hold up against weather and wear with their waterproof and anti-rust properties. Effective Air Circulation Installed on an external wall, the louvered vent cover contributes to maintaining the much needed indoor air circulation. This helps in not only providing a healthy indoor environment but also saves ample space. Specifications: Material: stainless steel Size: about 4 inches Color: black Package include: 24 x Round air outlet vents Notes: It is recommended to wear gloves during installation and pay attention to the edge area to avoid scratches. Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens. The edge of the product is peaked, please use it with care.