Features: Graphite crucible has good thermal conductivity, can greatly shorten the melting time, saving energy. Graphite crucibles have good thermal stability, suitable for emergency or cold conditions of use. With excellent corrosion resistance, impact resistance, acid resistance and alkali resistance. Can melt gold, silver, platinum and other precious metals and alloys, long service life. It maintains the natural graphite's various physical and chemical properties. Specification: Material: Graphite Color: As shown in pictures Options: 1kg, 2kg, 3kg | Option | Top Diameter (mm) | Inner Diameter (mm) | Bottom Diameter (mm) | Inner Height (mm) | Outer Height (mm) | |--------|-------------------|---------------------|----------------------|-------------------|-------------------| | 1kg | 65 | 38 | 50 | 115 | 125 | | 2kg | 72 | 44 | 55 | 140 | 155 | | 3kg | 75 | 50 | 60 | 150 | 170 | Weight: 330 - 465g Type: Jewelry Tools Package List: 1 x Graphite Crucible