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 nice thermal stability. Nice characteristics,it has nice thermal conductivity, which can greatly shorten the melting time and save energy, and withstand 1700 degrees celsius, nice acid and alkali resistance, nice corrosion resistance, impact resistance. Widely applicable, the mould can be applied 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. There are 7 type optional ,you can choice follow your need. Wonderful sweet waRm gift for friend,family or yourself. Specifications: Material:Graphite Type:5 Holes,25g,50g,100g,200g,280g,500g Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece Graphite Ingot Mold