This is 3/64" Diameter 1/2oz Silver Solder with 1/2 oz Flux from Stay-Brite.

FEATURES: Five times stronger than ordinary solder with tensile strength of
            10,000-25,000 pounds per square inch.
          Will stretch under high pressure, but not break under constant stress
            and is vibration-resistant.
          Conducts electricity better.
          Lead free making it environmentally friendly
          Melts and flows at 430°F, providing strength without distortion

INCLUDES: One 3/64" Diameter, 1/2oz Silver Solder Coiled
          One 1/2oz Bottle of Flux
          One Instruction Sheet
          One Clear Plastic Storage Canister with White Lid
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COMMENTS: NOT for use with electronic applications