As a machine to produce metal ducts for making pre-arrange  holes in pre-stressing concrete,it can produce single-ripple and double-ripple metal ducts with diameters between  Φ35mm and  Φ130mm.The machine is suitable for both on-site and in-factory constructions.In addition ,our company also produces KBJ Flat Pipe-making machine ,which is an auxiliary device for KJ130 and used for slab anchors.