Product Material: This Metal Dryer Vent Cover is made of 304 stainless steel material that has been well tested by the manufacturer. It provides good rust and corrosion resistance in any weather conditions, ensuring long-lasting durability and reliability.Size: Total Size: 184x184x51mm / 7.24"x7.24"x2", Diameter: 145mm / 6", Mounting Hole Distance: 167mm / 6.57", Mounting Hole Dia.: 3.8mm / 0.15"Self Closing Shutter Flaps: This Metal Dryer Vent Cover is equipped with self-closing shutter flaps, it can not only stop the wind, rain, snow dirt, and fallen leaves from entering your environment to make sure the vent hose will not be blocked, but also can be opened automatically for optimal air exhaust and ventilation.Screws Included: This dryer vent cover comes with exterior wall outlet that includes 4 screws for easy installation.