Mtrzd Damper, For Fan Dia. 36", 100-240V, DAYTON, Mfr# 3C131

39 In.H-W 13.3 In.L Squ Alu Mtrzd Cntrl Dampr, For Nominal Duct Diameter Not Applicable, Damper Application Motorized, Number of Panels 1, Overall Height 39 in, Overall Length 13 1/4 in, Rough Opening Shape Square, For Duct Shape Square, Overall Width 39 in, Frame Material Thickness 0.1 in, Blade Material Aluminum, Maximum Air Pressure 4 in wg, Overall Diameter 39 in, Rough Opening Length 37 in, Rough Opening Width 37 in, Damper Type Dynamic, Maximum Air Velocity 3500 fpm