Speedi-Products SM-DWVG 05 3.25-Inch Height by 10-Inch Width Galvanized Wall Vent with Damper and 5-Inch Extension For use as the outside sidewall termintation of Kitchen, Bath and Dryer exhaust systems Used with all 3 25-Inch x 10-Inch duct vent products All Aluminum Construction for durability Seal joints with approved duct mastic sealants