Oatey 53023 60/40 Rosin Core-Carded, 1 oz 40/60 alloy of 40% tin and 60% lead. 60/40 alloy of 60% tin and 40% lead. 361 F - 460 F melting range for 40/60 alloy. F - 375 F melting range for 60/40 alloy. Can be used for electrical applications including wiring and other fine electronic work. Contains lead. Not for use on drinking water lines.