Tin solder wire Tin Content Sn63/pb37 for PCB LED electronics welding 

There are different ingredients for different purposes: 

Sn63/Pь37, Sn60/Pb40, Sn55/Pb45

for High end electronic products or high demand precision confidential instruments, household appliances, communication, cables, manual welding automation for road boards, electronics industry, etc.. Welding.

Sn50/Pb50, Sn45/Pb55, Sn40/Pb60

for General requirements for electronic products and displays Screens, household appliances, automotive electronics, instrumen, Electronics related to instruments, electric toys, etc...Component soldering.