... features: compact size, low noise,ingenious structure,stable air flow,excellent performance Blower Model: HC-251SCapacity scope: ... 50kpaDischarge dia.: 20(3/4")Cooling type: natural airMatched Motor Power: 0.55kW Usable voltage: 380V,400V,415VFrequency: 50Hz ... quality construction, and includes the following components: motor, air filter, main blower unit, air chamber, common base (with lube oil tank ...