KESTER part 24-6040-0069 is a high-quality solder wire featuring a Sn60Pb40 alloy with 3.3% flux core, making it perfect for a variety of soldering projects. This 1 lb spool of solder wire has a diameter of 3.17mm (0.125in) for easy handling and precise application. Trust KESTER for reliable soldering solutions that deliver professional results every time.