Designed for use in residential and commercial fans and blowers where low starting torque is required. (Air conditioners, roof ventilators and exhaust fans.) Ball bearings. NEMA Service factors. Resilient "cradle" style base. Product Specifications BRANDLeeson MANUFACTURERS PART NUMBERM900277.00 HORSEPOWER1/3 MOTOR RPM 60Hz1725/1140 VOLTAGE115 PHASE1 FRAME56 ENCLOSURE TYPEOpen/Drip Proof HERTZ60 SPEEDS2 ROTATIONSelect CCW (Counterclockwise) THERMAL PROTECTIONAutomatic RATED RPM1725/1140 MOUNTINGResilient Base-Extended Studs BEARING TYPEBall INSULATION CLASSB SERVICE FACTOR1.35 AMBIENT TEMP C40 DUTYContinous is_motorYes RPM RANGE1701-1800 COMPATIBLE WITH/REPLACESMarathon B388 FL AMPS5.4. 2.9 ENCLOSUREODP