Oatey 50684 Safe-Flo Silver Plumbing Kit Copper, bismuth, tin and silver alloy. 420 F - 460 F melting range. Meets ASTM Standard B-32 and the requirements of the Safe Drinking Water Act. Formulated for plumbing/potable water line applications. Copper, bismuth, tin and silver alloy 420F - 460F melting range Meets ASTM Standard B-32 and the requirements of the Safe Drinking Water Act Formulated for plumbing/potable water line applications Lead free solder