Ingot Mold 3.5in Outer Length Gold Silver Melting Refining Graphite Ingot Casting Tool for Factory Item Type: Ingot casting tool Material: Graphite Outer Diameter Size: Approx. 90 x 18 x 12mm / 3.5 x 0.7 x 0.5in Inner Diameter Size: Approx. 80 x 8 x 8mm / 3.1 x 0.3 x 0.3in Product Description: The graphite crucible smelting original material is crystalline ordinary graphite. Therefore, the original ordinary graphite with various physical and chemical properties is retained. Using special high purity graphite material, high strength, high density graphite material; excellent technical personnel; high accurate CNC processing equipment, etc., can provide customers with excellent graphite crucible smelting, casting crucible, graphite tank, pulling force , tie rods, molds and other graphite products performance. Using special special materials can make our graphite crucible products more than 2 times more durable than ordinary materials, longer service life, and more resistant to high temperatures above 2000 ℃!