6" Round Damper Assembly, Includes:Actuator, Zone Controller, Mounted on Round Air Damper With Control Enclosure, Supply Power:24 Volt AC, Power Consumption:12VA Maximum, Operating Temperature:35F to 125F, Operating Humidity:90 RH Non-Condensing, Damper Body:20 Ga Galv Steel, Damper Blade:18Ga Galv Steel, Damper Bearings:Stainless Steel, Damper Seal:EPDM Rubber Gasket, Weight:12 Lbs 15.6oz