Features: 1. According to the use conditions of graphite crucible, the thermal stability is good. 2. Good corrosion resistance and anti-impact performance ensure the reliability of product quality. 3. Good resistance to strong acid and strong alkali. 4. Good heat transfer performance: greatly shorten the melting time and save energy. 5. Ash content is less than 0.1% , to ensure the precious metals in smelting is not contaminated. 6. In high-temperature using process, it got small thermal expansion coefficient. 7. It has certain strain resistance to the thermal shock, quenching. 8. With long service life. Specification: Condition: 100% Brand New Item Type: Graphite Mold Material: Graphite Color: Black Size: Approx. 7.1 * 5.1 * 1.1cm / 2.80 * 2.01 * 0.43inch Weight: Approx. 180g Package List: 1 * Graphite Crucible Mold (5 Grooves) 1、According to the use conditions of graphite crucible, the thermal stability is good 2、Good corrosion resistance and anti-impact performance ensure the reliability of product quality 3、Good resistance to strong acid and strong alkali 4、Good heat transfer performance: greatly shorten the melting time and save energy 5、Ash content is less than 0.1% , to ensure the precious metals in smelting is not contaminated