... PRE-WIRED POWER CORD -. EXTERNAL MOTOR This 4" Vortex Inline Duct Blower features high power motor and an aerodynamically designed shape ... use in damp environment Extended collar and lip for easy duct hook-up Solid metal construction with powder coated housing ... -. KITCHEN EXHAUST, RANGE HOOD-. GENERAL VENTILATION MOTOR-. INLINE DUCT FAN-. EXTERNAL MOTOR-. 115-120V 60HZ, 220V 50HZ, 220V 60HZ-. ...