1CORROSION RESISTANCE: Excellent thermal stability, fast heating and cooling, resistant to strong acid and alkali corrosion, used in gold and silver and other precious metal melting. 2EXCELLENT PERFORMANCE: This pure graphite melting crucible has excellent thermal shock resistance, electrical and thermal conductivity, and is stable during the melting of metals. 3STRONG STABILITY: Good wear resistance, strong lubrication performance, strong service life, high purity, high density, high mechanical strength and chemical stability. 4HIGH PURITY: Made of pure graphite to ensure the precious metals in smelting are not contaminated. Graphite casting crucible designed for melting gold, silver, copper, brass, aluminum, etc. 5HIGH EFFICIENCY: With high stability performance and good thermal conductivity, it can greatly shorten the melting and molding time and improve the efficiency of metal melting. Item Type: Disc Graphite Crucible Disc Material: GraphiteOuter Size of the Disc: Diameter: Approx. 45mm / 1.8in Height: Approx. 10mm / 0.4in Inner Size of the Disc: Diameter: Approx. 30mm / 1.2in Depth: Approx. 5mm / 0.2in 1 x GraphiteCrucible