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 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.