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Formulated for heavy duty soldering of heavy metal parts. 5 times stronger than ordinary solder, 10k to 25k tensile strength. Better choice than lead based solders for custom landing gear construction. Flows smoothly at 430 degrees. Works with any open flame torch such at propate and butane. Contains no lead, cadnium or antimony Stress and vibrations resistant. Contents 14.7g.
 "Copper Bearing Lead Free Plumbers Solder 14.7g")