Hengfeng Evergreen Technology Co. Ltd is an air filter and purification manufacturer .We constructed our own production plant with full facilities and workers based in mainland China. We specialized in various of air filter. Our main products include the initial, medium & high efficiency air filter, dust filter, dust bag, gas/liquid filter which are widely used in automobile, electron, medical, energy, food, building, chemical, tobacco, cement, iron and steel industries. We supply one stop service from design, production, packing, shipping.