Package includes: 4 pieces of graphite ingot molds, providing sufficient quantity for your DIY needs. Quality material: Our casting ingot molds are made of high-quality graphite with low ash content, helping maintain metal purity during refining. These molds are durable, sturdy, reliable, and reusable, resistant to breakage and deformation, designed for long-term use. Size details: External dimensions approximately 100 x 50 x 25 mm (3.94 x 1.97 x 0.98 inches), internal dimensions approximately 90 x 40 x 20 mm (3.54 x 1.57 x 0.79 inches). Capacity suitable for melting up to 1 kg of gold or 500 g of silver, meeting everyday usage requirements. Performance: The graphite ingot mold offers excellent thermal conductivity, reducing melting time and conserving energy. It can withstand temperatures up to 2000C, features good resistance to acid and alkali corrosion, strong impact resistance, a compressive strength of 89 MPa, and a flexural strength of 487 MPa. Applications: This graphite mold is widely used for melting non-ferrous metals such as gold, silver, aluminum, copper, brass, and zinc. Suitable for laboratory experiments and metal analysis. Can also be used as an ingot mold for various 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: Other items not included. Slight color variation may occur due to lighting and screen settings. Measurement error allowed within +/- 13 cm.