Broan 421 10" Vertical Discharge In-Line Damper, NA 10 In. Round Damper for Range Hoods and Bath Ventilation Fans; Depth 1.130; Weight 0.50; Color 0; Operating System; Batteries Included; Batteries Required; Number of Batteries 0; Battery Type N/A; Language English; Assembly Required 10 in. vertical discharge in-line damper operates in conjunction with the use of your ventilation fan or range hood Damper is made of 24 gauge galvanized steel construction for durability and long life Height 9.880 Width 9.880