Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 721 250 350 A 721250350A Auto Darkening Lenses Lincoln OEM CASE SIDE Select Your Head:WITH STEEL WHEEL HEAD 3900SWH Lincoln OEM CASE SIDE 170 Welding process output mode Rating basis Amperes Volts Duty cycle As printed by Lincoln DC Pipe Current NOT LABELLED (Rated DC Output column) 300A 32V 100% DC Pipe Current: 300A 32V 100% DC Touch Start TIG NOT LABELLED (Rated DC Output column) 250A 30V 100% DC Touch Start TIG 250A 30V 100% DC Constant Voltage NOT LABELLED (Rated CV Output column) 300A 32V 100% 300A 32V 100% DC Constant Voltage NOT LABELLED (Rated CV Output column) 350A 28V 100% 350A 28V 100% Output range — as printed by Lincoln Mode parameter Range DC Pipe Current 40 300 AMPS DC Touch Start TIG 20 250 Amps DC Constant Voltage 14 32 Volts Single Dial Continuous Control DC CC Stick range NOT STATED Open circuit voltage NOT STATED Rated ambient temperature Derating footnote only: "High Temperature: For maximum rating bonnet and fittings Model HP721 is a Single Stage Cylinder Regulator in Brass Barstock for pressure control of non corrosive gases when pressure rise is not critical