PVC Hose, Rubber Hose, PU Duct Hose manufacturer / supplier in China, offering 4inch 10m Uninsulated Flexible Duct Vent Hose Exhaust Duct of Flue Gas Fan, Cost Save Flexible Indoor Dryer Vent Hose Air Duct, Composite Hose Oil Petroleum Hose Composite Rubber Suction Hose and so on.