Hot Max 23076 1/8-Inch E4043 Aluminum Arc Welding Electrodes, 1# All position rod for all types of aluminum including tubes, sheet, cast and wrought aluminum E4043 is the highest strength alloy for ARC and gas torch welding Product can be used with gas torch applications as a brazing alloy Weight No. 1, Diameter of 1/8" and amperage of 80 to 135 We recommended machine polarity: DCEN (DC-)