High Frequency Bellow Welding Machine GL-5G/Q-2G L (For welding square bellows) High Frequency Output5KW Oscillation Frequency27.12 MHZ Power SupplyAC 220/380/400/415/440V 3Phases Input Power8.5KVA Maximum Pressure80kg Max Gap between front and back electrodes10mm Stroke10mmMax Machine measurements1500mm x 1200mm x 1250mm Protection System: 2D21 1) High Frequency Bellow Welding Machine with dual frequency 2) Special for welding bellows 3) 2D21 Protection System