10K Plumb Yellow Gold Hard Sheet Solder, melts at 1290-1426 F. With this solder, you do not need to go low karat to be able to melt at low temperatures. The solder is supplied in 1 dwt (1.55 gram) packages, and the approximate size of the sheets are 1 5/8" x 1/2" x 30 gauge. This solder is solid plumb 10K Gold. This solder is Nickel and Lead free, but does contain Cadmium. California Proposition 65 warning: Cadmium is known to the state of California to cause birth defects or other reproductive harm. For more information, please go to www.P65Warnings.ca.gov