1.tin solder 2.lead free welding wire 3.very little smoke and ... (Melting moint):about 227oCLine diameter:0.6mm,0.8mm,1.0mm,1.2mm,1.5mm,2.0mm,2.3mm.... Please contact us if ... communication, meters, instruments and copper, tin and irons and etc.2) Residue is easy to remove by hot air after soldering ... Lead-Free solder bar and wire3)Tin welding wire with2.0%-2.2% soldering flux lead free tin solder