... -1500mm This spiral tube former,spiral duct machinery,sprial duct forming machine, spiral duct machine, spiral tubeformer, spiral tube machine, is for producing spiral round ducts ... diameter range85-1500mm2Duct lengthunlimited3Suitable raw materialAluminum, stainless steel, galvanized steel, color steel4Raw material thickness0.4-1.0mm5Linear feeding speed1-38m/min6Main ...