This is a new 4K Gold All Purpose White Solder. Great for general repair & sizing of rings. Hoover & Strong plumb gold solders comply with the Gold and Silver Stamping Act Amendments. Hoover & Strong Repair Solders are lower karat and easy flowing, because these karats are lower karat they may not color match karat gold as well as plumb solders. Metal - 4K Gold Solder Type - Repair Solder Recommended Use - General Repair Melting Point - 1220 Flow Point - 1285 Approximate Weight - 1.5 grams