TrakPower Rosin Core Lead Free Silver Solder 0.53 ounces (15 grams) Great for a wide variety of electronic soldering applications, including hobby, home and industrial projects. Provides strong solder joints with low resistance and high conductivity Environmentally safe is RoHs compliant, contains no lead and 3% silver. Rosin core provides superb solder flow. Not intended for plumbing applications.