... : single or double layersType of the bellows: annular bellowsApplications: for auto exhaust bellows, flexible metal hoses, and expansion jointsControl: PLC controlLength: ≤7500mmExpanding medium: ... Double layers:0.8*2-1.6*2Type of the bellows: annular bellowsControl: PLC control, manual or automatic controlStraight tube ... DN200,250, 300,350,400,450,500,550,600mm Hydraulic Metal Hose Making Machine