Broan-Nutone 6 In. Mill Finish Aluminum Wall Vent Cap

For 6′ round duct for range hoods and bath ventilation fans. Built-in spring-loaded backdraft damper and bird screen to keep outside weather and pests from entering your home. Overall size showing on the surface is 9′ square with a 5-1/2′ hood and a 1-1/4′ long attachment collar for 6′ round ductwork (NOT for use with dryer venting). Wall cap is made of 22 gauge CRCQ steel construction with a .025 natural aluminum finish for durability and long life.