Black powder coated gooseneck roof vent with spring backdraft damper and removable screen commonly used for bathroom and kitchen range venting. Remove the screen and use for rooftop clothes dryer venting. Top quality 26 gauge galvanized roof vents with 2" collar extension for connection below the flat flashing. These vents can take some abuse and remain functional. Black dampered roof vents are available in 4" and 6" round and 6 x 10" and 10 x 10" rectangular. Contact us for other sizes.