... air duct making machine.Not only the best price to attract the customers SBKJ--professional on Spiral Tube former such machinery ... hydraulic pressure motor4kwSuitable MaterialAluminum, Stainless steel, Galvanized steelthis spiral tube former has many Features as bellow:Special mould for various ... and small, site work Perfect swage, without leakage Spiral tube former,tube former, roll forming machine