SBKJ SPIRAL TUBEFORMER is based in the Yangtze River Delta, nearby Shanghai,China. Our company is a national new high-tech enterprise which is specialized in the development and manufacture of machines,such as tube forming machines, plasma cutting machines, for the production of round ducting and fittings in sheet metal, mainly for the climate and ventilation industry. We have gotten the certificates of ISO9001:2000 and ce. Our customers from more than 60 countries in the world.SBKJ?s research and development is the cornerstone for our automatic tubeformers that produce a higher quality duct with reduced production costs. Several patented inventions, such as the Flying Slitter and Flying Crimper have established SBKJ as the foremost and leading innovator in spiral duct manufacturing.Our highly trained technicians will install and set up each SBKJ machine and train your personnel on all facets of the machine?s operation and maintenance.We sincerely welcome both domestic and international friends to cooperate with us.