Hangzhou Dongxing Telecommunication Material Co.,Ltd is one of the professional China aluminum foil flexible duct manufacturers and suppliers,Website:://.dxdxal.com, and equipped with a productive aluminum foil flexible duct factory and company, welcome to contact us.  Double side,Non-bonded,Aluminium foil   Thickness:30u-50u   Width:5mm-1000mm   ID:52mm±0.5mm or 76mm±0.5mm   OD:250mm-600mm   Color:Sliver Single side,Non-bonded,Aluminium foil   Thickness:25u-450u   Width:5mm-1000mm   ID:52mm±0.5mm or 76mm±0.5mm   OD:250mm-650mm   Color:Sliver,Blue,Gloden