... no heat, no power 3. weld electrical cable, wire, brass SZ-3T 0.80mm-4.0mm copper wire cold pressure ... difference.Main parameters1.Welding Range(wire) Copper: 0.80mm-4.0mm Aluminum: 0.80mm-5.5mm2.Machine Structure: Spheroidal Graphite ... example, if you want to weld 0.8mm, 1.2mm, 2.0mm, 3.0mm copper wire, you can ... choose our model SZ-3T, or SZ-3TR. 0.80mm-4.0mm copper ...