RIDGID ER70S-6 0.035 in. x 10 lbs. mild steel MIG wire. Designed for welding mild and carbon steels. ER70S-6 wire can be used in all welding positions, including flat, horizontal, vertical, and overhead. This wire is ideal for any user due to its versatility, ease of use, and reliable performance in welding mild and carbon steels. Produce welds on dirty or rusted steel.