Maximize the air and sound performance of your Broan ventilation fan by using one of our wide variety of termination fittings specifically designed for Broan fans. Black steel roof cap with built-in back draft damper and bird screen 4 diameter metal duct connector Two nylon zip ties 3 to 4 duct adapter 8 of 4 diameter flexible foil ducting conforms to UL 181 Class 1 Air Connector requirements Do not use for dryer venting Product Color: Black|Product Material: Galvanized Steel|Product Material: Aluminum|Height: 4.4 |Width: 11 |Depth: 10.3 |Weight (Approximate): 3 lb|vent & ducting accessories broan rvk1a 1033169514 rvk1a nutone rvk1a vent duct kit RVK1A Vent Duct Kit Vent Duct Kit RVK1APackage Contents: 8 ft. of 4 |Flexible|2-ply Metallic Laminate Ducting 4 Diameter Metal Duct Connector 2 x Duct Clamps 4 to 3 Reducer Roof Cap This item cannot be shipped to APO/FPO addresses