1.Material for flexible ducts 2.We are manufacturer 3.We supply spring steel wire,aluminized PET,aluminium PET foil,PVC,ect Specifications 1.Material: 60#, 70#, 75#, 72A, 72B, 82B, 65Mn 2.Diameter range: 0.15-12. 0mm 3.Standard: GB4357-89, DIN17223 4.Shipment: Prompt 5.weight: As the buyer's requests6.We supply spring steel wire,aluminized PET,aluminium PET foil,PVC,ect Wire diameter0.15-12mm T/ ...