Compressor, Condenser, Evaporator manufacturer / supplier in China, offering Duct R6 R8 Insulated Flexible Air Duct/Hose Fiberglass Aluminum Foil Insulation Duct, Non-Insulated Flexible Air Aluminum Ducting for HVAC Ventilation, Ventilation Semi Rigid Aluminum Flexible Air Duct for Air Conditioner and so on.