White Air Vent Grille - Air Vent the diameter of the flange is 100mm/4" Helps prevent rain, wind, snow, birds and pets from entering the ventilation openings of the outdoor dryer, gravity flap in one direction. The vent cover is easy to install and can be easily opened to achieve maximum exhaust flow. Premium Material: The air vent is made of high quality durable UV resistant ABS plastic, environmentally friendly and non-toxic. Built-in gravity flap. Perfect combination with other ventilation products. Further items can be found in our shop., Manufacturer: Awenta