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 will not break under constant
            stress and is vibration-resistant.
          Conducts electricity better.
          Lead free making it environment friendly
          Melts and flows at 430 degrees Fahrenheit, 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
                                                                          ir/jl