high humidity and good flow rate tin welding bar for PCB board1:good humidity,bright beautiful,fast 2: ... is specialized in producing and selling tin products.Such as tin solder bars,tin solder wires,tin ingots,anode stubs,soldering flux,apply ... of electronics,communication,electric appliances,electric instruments and meters. tin weilding powder Sn63Pb37(soldering material)Accordance with the RMA grade ...