Package includes: 4 graphite ingot molds. The quantity provided meets basic DIY needs. Made of high-quality graphite material, these molds are ash-free, ensuring the metal refining process remains unaffected. Durable, sturdy, and reusable, they resist deformation and offer long-term use. Outside dimensions: 100 x 50 x 25 mm (3.94 x 1.97 x 0.98 inches). Inner dimensions: 90 x 40 x 20 mm (3.54 x 1.57 x 0.79 inches). Suitable for casting up to 1 kg of gold or 500 g of silver. Features excellent thermal conductivity, reducing melting time and improving energy efficiency. Withstands temperatures up to 2000°C. Offers good resistance to acid, impact, corrosion, and thermal shock. Compressive strength: 89 MPa. Flexural strength: 48.7 MPa. Ideal for use in experiments and melting non-ferrous metals such as gold, silver, aluminum, copper, brass, and zinc. Can also be used for laboratory analysis and ingot formation. 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. Due to lighting and display differences, actual color may vary slightly from images. Measurement may vary by ±1–3 cm.