iO HVAC Controls EB-1818 Electronic 18 X 18 Bypass DamperiO HVAC Controls EB 1818 ACTUATORS ARE INSTALLED ON 2ND DIMENSION Electronic 18 x 18 Bypass Damper Height: 18 Width: 18 Total Size: 18 x 18 Actuator Placement on the dimension: 18 Additional Information Item NumberEB 1818 BrandiO HVAC Controls MotorizedYes ShapeRectangular Size (in)18 x 18 Spring ReturnNon Spring Return TypeBypass Dampers