Price listed is for 20 feet of soldering wire. This wire is lead-free solder whose composition is 96% tin with the remainder mostly copper with some antimony and a trace of silver. It Melts at 440°F and has an Acid core which means it's pre-fluxed. This wire is thinner than our other solder wires and measures about 0.025'' (0.64mm). It is the ideal solder for pewter and copper-based metals. Use in well ventilated area.