Function: 1. Graphite crucible has good thermal conductivity, can significantly reduce melting time, saving energy 2. Graphite crucibles have good thermal stability, suitable for emergency or cold conditions of use 3. With excellent corrosion resistance, impact resistance, acid and alkali resistance 4. Can melt gold, silver, platinum and other precious metals and other alloys, long service life 5. Retains its original natural graphite with different physical and chemical properties Specification: Characteristics: Graphite crucible has good thermal conductivity, can significantly reduce melting time, saving energy. Graphite crucibles have good thermal stability, suitable for use in emergency situations or at low temperatures. With excellent corrosion resistance, impact resistance, acid resistance and alkali resistance. It can melt gold, silver, platinum and other precious metals and other alloys, long service life. It retains its original natural graphite with different physical and chemical properties. Specification: Material: graphite Color: shown as pictures Options: 1kg, 2kg, 3kg OptionUpper diameter (mm)Internal diameter (mm)Lower diameter (mm)Internal height (mm)Outside height (mm) 1kg 653850115125 2kg724455140155 3kg755060150170Weight: 330 - 465g Type: Jewelry Tools List of packages: 1 x graphite crucible