Product Overview Models covered: NBC-270K / NBC-315K / NBC-350K The NBC-270K/315K/350K series is a separate-type CO2 gas-shielded welding machine engineered for professional industrial use. Featuring automatic dual-voltage input detection and an advanced single-tube IGBT inverter, it delivers low spatter and a neat bead appearance across all three models. Key Features Separate-type CO2 gas-shielded welding machine design Automatic input voltage detection: single-phase 220V /