The AOBD series of motorized dampers are constructed of lightweight anodized aluminum with a 24 volt power open-power closed damper motor. These dampers are available as a side mount, Model AOBD; a bottom mount, Model AOBM; and an internal mount Model IOBD. These lightweight and thin profile dampers are perfect for inserting into any duct and providing maximum air flow control. The power open-power closed damper has built-in end switches to control additional dampers or other auxiliary components. The AOBD series of dampers are for systems up to a maximum of 0.5″W.C.