Aluminium ARC Welding Electrodes E1100/E4043/E3003/E5183 The red plastic case is only for display, not in the packet. Wide range of applications: suitable for welding or surfacing alloys with high strength, good forgeability and good corrosion resistance. Perfect welding effect: It has good weldability and corrosion resistance, high thermal conductivity, high electrical conductivity and excellent processing performance, so the design has a complete and smooth welding effect.