With a tensile strength equal to 65% silver solder, Phos Copper Solder is a low-cost alternative solder for copper, brass, and most other non-ferrous alloys. Composed of phosphorous, copper, and 3% silver, Phos Copper Solder has a flow temperature of 1325° F. Provided in a hand syringe containing 1 ounce of pre-fluxed Phos Copper paste. Made in USA.