Features: Reliable material, main material is graphite, ensuring that the metal purity will not be affected during metal refining; rapid cold and hot use conditions, with excellent thermal stability. High thermal conductivity helps reduce melting time and save energy, and can withstand temperatures up to 1700 degrees Celsius. Offers excellent resistance to acids, alkalis, corrosion, and impact. Widely applicable for experiments and smelting of non-ferrous metals such as gold, silver, copper, and aluminum. Due to its size, this product is more suitable for small-capacity metal melting. Seven types available for selection based on your needs. Specifications: Material: Graphite Type: 5 Holes, 25g, 50g, 100g, 200g, 280g, 500g Note: Please allow 1-2 cm errors due to manual measurement. Please ensure you are comfortable with this before ordering. Due to differences between monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece Graphite Ingot Mold