Welding Wire & Rod, Casters & Wheels, Rigging Supplies (Cable Wire Ropes), Markers, Gloves and much more. 030 0.8mm 16 LB SPOOL 4043 Aluminum Welding MIG WIRE. ER4043 Aluminum Welding Mig Wire. 030 x 16 lb Spool. Brand New - ER4043 Aluminum Welding Mig Wire - AWS : ER4043 - Size.