Our lead-free solder bars and wires come from the refined Tin,Silver,Copper.All the raw materials must pass the strict evaluation before saucing . In this way , the toxic elements such as lead,Cd and Hg can be effectively prohibited, banned by EU ROHS directives.Meanwhile,we strictly controlled the above toxic materials according to LF-A(Pb<100ppm;Cd<5ppm)and LF-B(Pb<400ppb;Cd<10ppm)directives.And also ,we can lower the toxic materials percentage in thesolder ,if our customers have higher demand.