Features: brand new and high quality Good Thermal Stability:The crucible can be quickly heated and cooled according to the conditions of use. Good corrosion resistance and impact resistance, ensuring the reliability of product quality. Good resistance to strong acids and alkalis. crucible has good heat transfer performance: greatly shortens the melting for time and saves energy. The ash content is less than 0.1% to ensure that the metals in the smelting are not polluted. In the process of high temperature use, its thermal expansion coefficient is very small; and it has a certain degree of thermal shock resistance, quenching strain capacity, and long service life. crucibles are usually used for the smelting of alloy tool steels and the smelting of non-ferrous metals and their alloys. Specifications: Material: Color: Black Product Dimension: approx. 7.2x5.7x1.2cm/2.83x2.24x0.47inches Net Weight: 50g/0.11lbs Package Includes: 1PC Crucible Smelting and Casting Ingot Refining Mold note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.