1. NSK low noise high quality rolling bearing. 2. Brass terminals plug-in. 3. Shaft: single shaft, nickel plating treatment. 4. Enclosure: electrophoretic coating treatment. 5. Winding: 100% pure copper. Product features: 1. Steel housing, designed for cooling system, evaporative cooler etc, suit for hot weather environments. 2. High quality winding with excellent insulation and heat transmission properties. 3. Nice appearance, high starting torque, low starting current, smooth turning, low temperature rise, low vibration, low noise and great overload performance. 4. Saving Energy, higher efficiency. 5. Long life, Equipped with overheating protection, good Protection against Humidity. Product use: 1. Various kinds of air coolers, commercial and residential. 2. Air conditioning system.