This no-clean, lead-free solder is made with Sn/Ag/Cu (tin/silver/copper) alloy as a lead-free alternative for the standard tin / lead solder. A given wieght of lead-free solder has 27% more length than leaded solder of the same diameter. Use this solder anywhere you would use normal solder. Conforms to the impurity requirements of J-Std-006 and RoHS.