Aluminum Flexible Duct, Plastic Telescopic Tube, Washing Machine Pipe/Hose manufacturer / supplier in China, offering Fire-Proof Foam Aluminum Foil Insulated Spiral Duct Air Duct for HVAC Ventilation System, Galvanized Steel 90 Degree Bend with Rubber Ring Duct Connection Spiral Duct for HVAC System, Detachable Filter Fan 803 Electrical Panel Fan, Filter Rectangular Shield Grille and so on.