US Motors Centrifugal Ventilation Direct Drive Blower, 1/4 HP, 1-Phase, 1020 RPM MotorUS Motors Centrifugal Ventilation Direct Drive Blowers are designed to meet manufacturer's requirements for direct drive ventilation units. All blowers are 60 Hz and are Open Air Over (OAO). They feature a shaded pole and permanent split capacitor. 5.0", 5.6" and 6.3" in diameter. Product Specifications BRANDUS Motors MANUFACTURERS PART NUMBER5464H HORSEPOWER1/4 MOTOR RPM 60Hz1020 VOLTAGE115 PHASE1 ENCLOSURE TYPEOpen/Drip Proof HERTZ60 RATED RPM1020 INSULATION CLASSB is_motorYes RPM RANGE1001-1100 HERTZ (HZ)60