... 15kg,20kg per spool CO2 gas protection welding wire ER70S-61) er70s-6 welding wire, mig welding wire, co2 welding wire2) Sizes: ... : Can be widely used to weld carbon steel wires and alloy steel construction,such as ship building, bridge building, ... machinery manufacturing and general welding purposesPacking:spool weight: 1kg ,5kg,15kg,18kg ...