1.2mm & 1.6mm Diameter 1lb/Spool 40/60 Lead-Based Electrical Solder for Electronic Repair from China 40 60 lead-based solder, a blend of 40% tin and 60% lead, known for its excellent conductivity, smooth flow, and durability. 40 60 solder is a popular choice for professionals and hobbyists alike due to its optimal melting point and superior wetting properties.
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