Profile: Zhangjiagang JK Machinery Co., Ltd. is a supplier of spiral duct machine, spiral tubeformer, aluminum duct machine, and aluminum flexible duct machine. The spiral duct is mainly used in round ducting ventilation. With the development of central air-conditioning, more and more round duct is used, like the aluminum flexible duct, and the PVC tube. The metal plate is widely used in air duct and manufacturing in a variety of industries. We supply hydraulic press brakes & shears for cutting plates and shaping them.