Ec Fan, DC Brushless Fan, External Rotor Motor Fan manufacturer / supplier in China, offering 140X72mm 24V Ec Brushless Motor Forward Curved Centrifugal Fan for Exhaust System, 175*68mm Plastic Smoke Ejector Ventilator DC Backward Curved Centrifugal Ventilation Fan for It Cabinet with UL, 220W 230V 160mm Waterproof IP55 Fan Ec Single Inlet Blower Souffleur and so on.