High Temperature Flexible Air Duct, Air Condition Duct, Insulation Air Duct manufacturer / supplier in China, offering Fire Retardant (FR) PCA Flexible Duct for Airport Ventilation, High Temp 120º C, 355*355-6mz PCA Duct Aircraft Ground Air Conditioning Duct Pre-Conditioned Insulated Air Hose, Portable Explosion Proof Exhaust Blower ATEX Certified Hazardous Area Ventilation and so on.