Lead-free Silver-bearing Solder This high-strength, lead-free solder is great for repairing joints on printed circuit boards in computers, TVs, VCRs, CBs and Ham radios. It has a 96% tin/4% silver formula with a diameter of .062". SnAg 96/4 Lead-Free Rosin-Core Solder 0.062" Diameter. Net weight 0.5 oz