Contact Tip Compatible with Brand Lightning Series S19391 Compatible with Model Magnum 300 Magnum 400 Compatible with Series Magnum 300 Magnum 400 Tip Shape Cylindrical Duty Rating Standard Duty Maximum Wire Diameter 0.03 in Maximum Current 400 A Connection Type Threaded For Nozzle Series M16082 For Gas Diffuser Number S19395-1 Welding Processes MIG Welding (GMAW) Connection Thread Size 1/4 In.-28 Inside Diameter 0.037 in Outside Diameter 0.25 in Overall Length 0.5 in