Industrial quality, resilient mounted, ball bearing motors for fan and blower service.?á Moderate starting torque electrical design to reduce stress on the fan blades during start-up.?á Suitable for belt-driven fans or fan-on-shaft applications.?á Self-ventilated design, may be mounted outside of the fan's airflow. Product Specifications BRANDLeeson HORSEPOWER1 MOTOR RPM 60Hz1140 VOLTAGE208-230/460 PHASE3 FRAME56 HERTZ60 RATED RPM1140 MOUNTINGRigid AMBIENT TEMP C40 LENGTH INCHES19-5/8 WIDTH INCHES10-5/8 HEIGHT INCHES11-1/4 COMPATIBLE WITH/REPLACESMarathon X513