Zonon 36 Pcs Stainless Steel Soffit Vents 4 Inch Round Dryer Vent Cover with Mesh Screen for Home Outdoor Bathroom Wall Ceiling Outside Exterior Exhaust (Black) Innovative Practical Design: the round soffit vents are strategically designed with a round flat cover with louvers; They strike an ideal balance between aesthetics and functionality by being waterproof, anti rust, and featuring an inclined louver at 45 degrees; Air outlet vents built in screen mesh can stop uninvited guests from entering the house; Please note that the edge is peaked, handle the product with care Easy Installation: the louvered vent is easy to install; By simply adjusting the regulating valve of the round louver grille cover, these vents can be installed on either the ceiling or the wall to cater to your requirements; Installed the louver grille cover on the external wall to maintain indoor air circulation, and installed in the air outlet of the corridor to save space Sturdy Material: the foundation vent is made of quality stainless steel; As a result, they offer a solid, and long-lasting service life; Featuring fine craftsmanship and simple style, it is suitable for different home decorations Versatile Usage: these wall vents are the solution for a wide range of applications; These features make it suitable for bathroom and kitchen fans, air conditioner, gas vents and most other wall vents Suitable Size: these ceiling vents are suitable for most round hoses with a diameter of 4 inches; Their suitable size ensures an ideal fit while also simplifying the installation and removal process