This solder blend from Enkay consists of 60% tin and 40% lead. Widely favored among stained glass artisans, the 60/40 alloy offers superior flowability for soldering copper foils and came seams. Details: Silver colored 1/8" (0.32 cm) wire diameter 1/2 lb. (0.23 kg) spool weight Melting range: 361°F (183°C) to 376°F (191°C) (transition from solid to liquid) 60% tin and 40% lead Safety Precautions: Utilize adequate ventilation and appropriate personal protective gear when using this solder. Dispose of hazardous materials only in approved containers. WARNING: This product contains lead which may cause allergy or asthma symptoms or breathing difficulties if inhaled, may damage fertility or the unborn child and may cause damage to organs through prolonged or repeated exposure. It is harmful if swallowed or inhaled.