1[Fast Heating and Cooling] Excellent thermal stability, can be quickly heated and cooled, used for gold and silver and other metals smelting. 2[High Performance] Resistance to strong acid, alkali and corrosion, excellent thermal shock resistance, electrical conductivity and thermal conductivity. 3[High Purity] Graphite mold is made of pure graphite, with high purity, high density, high mechanical strength and strong chemical stability. 4[Long Lasting] Rectangular graphite mold has good wear resistance, strong lubricating performance, long service life, and alchemy capacity of 5000g. 5[Applicable] Graphite crucible mold guarantees that metals in smelting will not be contaminated, and is designed for melting gold, silver, copper, brass, aluminum, etc.