This is a new 20K Gold White Hard 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 - 20K White Gold Solder Type - Plumb Gold Solder Recommended Use - Sizing/tipping Melting Point - 1565 Flow Point - 1615 Approximate Weight - 1.5 grams