12" Round Damper Assembly, Includes:Damper Actuator, Bypass Wiring Interface Card, Mounted on Air Damper with Enclosure,Supply Power:24V, Power Consumption:3.4VA Maximum, Operating Temperature:35F to 125F, Operating Humidity:90 RH Non-Condensing, Damper Body:20 Ga Galv. Steel, Damper Blade:Round 18 Ga Galv. Steel, Damper Bearings:Stainless Steel, Damper Seal:EPDM Rubber Gasket, Insulation:1/2" Foil Faced Fiberglass, Weight:20 Lbs 14oz