Guangzhou Jujin Electromechanical Mannufacture Co,.Ltd main produce ring blower ,from 1/8HP to 10HP.The details of GLB5500s as:Motor 7.5HP,Volt 380V Freq:50Hz,Max Pressure 45Kpa ,Max Flow 550m?/h.Max vacuum-26.5Kpa ,Noise <70dB