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. Excellent characteristics, it has high thermal conductivity, which can greatly shorten the melting time and save energy, and withstand temperatures up to 1700 degrees Celsius, with good acid and alkali resistance, excellent corrosion resistance, and impact resistance. Widely applicable, the mold can be used for experiments and smelting of non-ferrous metals, such as gold, silver, copper, aluminum, and so on; considering the size of this product, it is more suitable for small-capacity metal melting. 7 types available, you can choose according to 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 okay with this before ordering. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Package includes: 1 Piece Graphite Ingot Mold