Graphite Foundry Crucibles are made from a combination of graphite and clay, these crucibles are recommended for melting your precious, or non-precious metals and can handle large batches of material. Their thick inner walls can handle direct heat and open flame foundries. They can be used with our propane melting furnaces as well as a standard torch method. Rated to withstand temperatures that range up to 1560°F to 2912°F (850°C to 1600°C). Measurements: 7-1/2" x 8-3/4" (exterior dimensions); 6" in diameter x 8" deep (interior dimensions). *The "#" in title represents the amount of aluminum that the crucible can accommodate (in pounds); the "Kg" is for the amount of kilograms of brass and copper capacities.