... 3.less dross Tin solder welding bar is even above 400 high temperature, it can keep lucent surface with less dregs, ... which greatly reduces cost. It is applicable to various high temperature soldering, especially good in inductance wires, transformer and other industries ... products, general elecronics, automotive and electrical industry and hig temperature resistant prodcts.Item63/37;60/40;55/45;45/55 ...