Features: * Cannot be used on aluminum * Alloy of Tin, Copper, Silver, and Bismuth that works much like 50/50 solder * Used for tin plate work, sheet metal seaming, and hot water heating lines * Works with any high grade paste or liquid flux and a standard propane torch * Oatey no.95 tinning flux recommended (sold separately) * Provides excellent flow and fill characteristics * 3mm with 1/2 in. bevel What"s In The Box: * Oatey 29025 Lead Free Solid Wire Silver Solder - 1 lb.