Our high-purity graphite crucibles are designed for efficient metal melting and casting. These crucibles are perfect for smelting various metals, including gold, silver, copper, and aluminum. The robust construction allows durability and longevity, making them ideal for both professional jewelers and hobbyists. Features -Color:Black -Material:Graphite -Size:5.00X3.00X2.00cm/1.97X1.18X0.79in -Size:4.00X2.00X1.50cm/1.57X0.79X0.59in -Excellent thermal conductivity: our graphite crucibles offer thermal conductivity, allowing efficient heat transfer and faster melting processes, which significantly reduces production time -Useful: these ingot molds are ideal for refining processes and extending their lifespan compared to silicon carbide graphite crucibles -High temperature performance: designed to withstand extreme temperatures, our graphite crucibles are perfect for melting and casting various metals and alloys, enhancing production efficiency -Stable graphite structure: the stable graphite structure of our graphite molds allows a longer service life, minimizing the need for frequent replacements and reducing operational disruptions -Precision casting: ideal for precision casting and metal processing industries, our graphite crucibles meet the demands for high accuracy and stringent production requirements Package list: 5 x graphite crucible