BernzOmatic SSWS300PK All in One Plumbing Solder Kit Kit includes: 3 oz. Lead-free Silver bearing solid wire solder, 1 oz. Lead-free water soluble plumbing flux, 120 grit sand cloth for surface preparation, flux brush Melting temperature of 430 F/ 221.1 C Lead-free solder and flux, NSF 61 certified safe for potable water systems Perfect for creating water-tight seals in copper pipes and hot water heaters, and for general plumbing repairs Diameter of .062 in. (1.6 mm)