Package includes: 4 pieces of graphite ingot molds. The quantity provided is sufficient for DIY projects. Material: The ingot crucible molds are made of high-quality graphite, which is ash-free, ensuring the metal refining process does not affect the purity of the metal. The molds are durable, sturdy, and reusable, resistant to cracking and deformation, allowing for long-term use. Dimensions: The external dimensions are 100 x 50 x 25 mm (3.94 x 1.97 x 0.98 inches), and the internal dimensions are 90 x 40 x 20 mm (3.54 x 1.57 x 0.79 inches). The mold can hold approximately 1 kg of gold or 500 g of silver. The size is suitable for various casting needs. Performance: The graphite ingot mold offers excellent thermal conductivity, significantly reducing melting time and conserving energy. It can withstand temperatures up to 2000°C, with strong resistance to acid, impact, and corrosion. It has a compressive strength of 89 MPa and a flexural strength of 48.7 MPa. Applications: This graphite casting mold is widely used for experiments and melting non-ferrous metals such as gold, silver, aluminum, copper, brass, and zinc. It is also suitable for experimental analysis after melting and can be used for ingot formation and other related purposes. Color: Black Material: Graphite Size: 90 x 40 x 20 mm / 100 x 50 x 25 mm Package Contents: 4 x Graphite Ingot Molds Note: The package includes only the items listed above. Other accessories are not included. Due to lighting and display differences, the color in the image may slightly differ from the actual product. Measurement error allowance is +/- 1-3 cm.