We are the manufacturer of aluminium flexible duct and flexible duct connector for air-conditioning and ventilation systems in China,and also the manufacturer of acoustic panel which are sound insulation and fireproof,they are used for sound absorption,building and decoration materials.We have been handling this line for about 10 years,we export our products all over the world. Flexible duct 1)ALUDEC Made of tough aluminium laminated construction encapsulates a high tensil steel wire helix. It i...