Lincoln Replacement OMNIShield Clear Lens Dual Coating KP3757 1 Helmet Shells 117 Welding process output Select Your Head:WITH STEEL WHEEL HEAD 3900SWH 117 Welding process output mode Rating basis Amperes Volts Duty cycle As printed by Lincoln DC Constant Current NOT LABELLED (CC Pipe Rated Output column) 305A 29V 100% 305A 29V 100% DC Pipe Current NOT LABELLED (CC Pipe Rated Output column) 300A 29V 100% 300A 29V 100% Touch Start TIG NOT LABELLED (CC Pipe Rated Output column) 250A 30V 100% 250A 30V 100% DC Constant Voltage NOT LABELLED (CV Rated Output column) 300A 29V 100% 300A 29V 100% Output range — as printed by Lincoln Mode parameter Range DC Constant Current 20 305A DC Pipe Current 40 300A Touch Start TIG 20 250 A DC Constant Voltage 14 29 V Output Range (Product Specifications) 20 305A DC 40 300A Pipe 20 250A DC TIG 14 29V CV Open circuit voltage All Models Single Dial Continuous Control Fast freezing slag provides consistent puddle support all the way around the pipe 040"") for enhanced protection" Multiple Lens Styles Available: