... machinery in DUCT WORKSpiral Tube former,spiral duct machinery,spiral duct forming machine,spiral duct machine,spiral tube machineMain technical data:. Diameter range ... hydraulic pressure motor4kwSuitable MaterialAluminum, Stainless steel, Galvanized steelthis spiral tube former has many Features as bellow:Special mould ... small, site work Perfect swage, without leakage Spiral tube former/Round pipe