Ec Fan, DC Brushless Fan, External Rotor Motor Fan manufacturer / supplier in China, offering 220mm Ec Backward Curved Centrifugal Fan with Plastic Material for Advanced Air Filtration System, 200*80mm Waterproof IP55 Ec-AC Axial Fan for Ventilation Equipments, Basic Customization 230V IP44 Ec Axial Ventilation Fan with Guard Grille and so on.