... -300 Hydraulic Forming MachineDiameter: DN50-300mmNo. of layers: single or double layersType of the bellows: annular bellowsApplications: for auto exhaust bellows, flexible metal ... with the machines: The molds for DN50,65,80,100,125, 150,200,250,300mm5.DN200-630 Hydraulic Forming MachineDiameter: DN200-630mmNo ... head: DN200,250, 300,350,400,450,500,550,600mm Hydraulic Metal Hose Making Machine