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12X20 ND | Rectangular Damper | 12X20 ND MOTORIZED DAMPER | EWC Controls Additional Information_0.81 in Body Size; 1.16 x 1.31 in Center to End; 0.240 lb Weight 4 FKM TRUE UNION Y-STRAINERACTUATORS ARE INSTALLED ON THE 2ND DIMENSION, PHOTO IS GENERIC AND MAY NOT REPRESENT THE PART BEING ORDERED Rectangular Damper 12X20 ND MOTORIZED DAMPER The ND series of Ultra Zone dampers was designed with the installer and homeowners in mind. This damper is easy to install and easy to checkout. The LED display allows the installer to visually check the damper operation. With a sturdier frame, the damper installs in the duct much faster and easier