High efficiency, high-temperature insulation system. Capable of withstanding temperatures over 300 deg F. Reduces motor failures due to heat aging. Premium moisture-resistant insulation system. Styrenated epoxy coating on rotor prevents rust build-up and extends the life of the motor. 115 V, all copper windings, no base, 56Z frame. Auto-reset thermal overload protection. Great starting switch features. Heavy-duty bronze bearing. Mechanically and electrically approved for evaporative cooler applications. Label and instructions in English and Spanish. UL approved construction.