3 Tix Solder for Guns Irons Torches Machines This is a new set of 3 tubes of Tix solder Adheres to all ordinary solderable materials and works with a gun, iron, torch or soldering machine It is the hardest soft solder on earth Melts at 275&#176; F (135&#176; C) and has a holding power of 4,300 Psi Stays white and does not tarnish