used to welding low carbon steel and low alloy steel structure, such as boilers,nuclear stations, chemical containers. CO2 copper-coated gas shielding wire:different package for different wires:plastic spools, metal spools, pail package, straightened wire in plastic tube.AWS ER70S-3,AWS ER70S-4,AWS ER70S-6,AWS ER70S-G,AWS ER49-1