Feature: 1. Long service life. 2. Good heat transfer performance of graphite crucible: for greatly shorten the melting time and save energy; 3. In high-temperature using process, it got small thermal expansion coefficient. And certain strain resistance to the thermal shock, quenching. 4. Well resistance to strong acid, strong alkali. 5. Ash content less than 0.1%, to ensure the precious metals in smelting is not contaminated. 6. Good heat transfer performance of graphite crucible: for greatly shorten the melting time and save energy. Long service life. 7. Good heat transfer performance of graphite crucible: for greatly shorten the melting time and save energy. 8. Well corrosion resistance, impact resistance performance, to ensure the reliability of product quality. Well resistance to strong acid, strong alkali. 9. Well thermal stability: according to the using conditions of graphite crucible snap heat and cold. 10. Well corrosion resistance, impact resistance performance, to ensure the reliability of product quality. In high-temperature using process, it got small thermal expansion coefficient. 11. And certain strain resistance to the thermal shock, quenching. 12. Ash content less than 0.1%, to ensure the precious metals in smelting is not contaminated. Long service life. 13. Well resistance to strong acid, strong alkali. And certain strain resistance to the thermal shock, quenching. 14. Well corrosion resistance, impact resistance performance, to ensure the reliability of product quality. Specification: Non-stick pan when smelting metal, long service life, no loss of precious metal. Specifications: Main material: graphite The weight of gold that can be loaded: 1KG, 2KG, 3KG, 4KG, 5KG (optional) The inner diameter of the crucible: 1kg: 38mm 2kg: 44mm 3kg: 50mm 4kg: 60mm 5kg: 69mm The outer diameter of the crucible: 1kg: 47mm 2kg: 58mm 3kg: 65.5mm 4kg: 75mm 5kg: 89mm The outer diameter of the large ring: 1kg: 58mm 2kg: 65mm 3kg: 80.5mm 4kg: 85mm 5kg: 100mm Height: 1kg: 88mm 2kg: 110mm 3kg: 105mm 4kg: 130mm 5kg: 130mm Capacity: 1kg: 75ml 2kg: 150ml 3kg: 195ml 4kg: 340ml 5kg: 450ml Package size: 1kg: 15 * 10 * 10cm / 5.9 * 3.9 * 3.9in 2kg: 15 * 10 * 10cm / 5.9 * 3.9 * 3.9in 3kg: 15 * 10 * 10cm / 5.9 * 3.9 * 3.9in 4kg: 20 * 10 * 10cm / 7.9 * 3.9 * 3.9in 5kg: 20 * 15 * 15cm / 7.9 * 5.9 * 5.9in Package weight: 1kg: 204g / 7.2ounce 2kg: 280g / 9.9ounce 3kg: 360g / 12.7ounce 4kg: 425g / 0.9lb 5kg: 790g / 1.7lb Note: The product is a consumable, which will be oxidized each time it is used, and will be oxidized more when it is used to melt aluminum.. Package List: 1 * Graphite Crucible