Funnytoday365 25Oz Pure Graphite Crucible Cup Propane Torch Melting Gold Silver Copper Well thermal stability : according to the using conditions of graphite crucible snap heat and cold; Well corrosion resistance, impact resistance performance, to ensure the reliability of product quality; Well resistance to strong acid, strong alkali; Good heat transfer performance of graphite crucible: for greatly shorten the melting time and save energy; In high-temperature using process, it got small thermal expansion coefficient;