The graphite crucible has good thermal stability, suitable for emergency heat or cold usage condition. Good corrosion resistance and impact resistance. acids resistance and alkalis resistance. The graphite crucible has good thermal conductivity properties,it can greatly shorten the melting for TIME and saved energy. The ashes of graphite crucible is less than 0.1 percent ,to that the preciou metal in the smelting is not contaminated. It can melt gold, silver, and other preciou metals and other alloys,with long service life. for gold and silver melting after the formation of gold and silver pieces can also be used as graphite crucible melting into non-ferrous metals, test analysis, as the ingot mold and other purpose Size: 3 hole - alert: 57 x42x11. 5 mm, inside 1:7.9 x 20.6 x 4.1 mm, inner 2:10.5 x 29.5 x 4.1 mm, inner 3:13.0 x 35.8 x 4.1 mm Capacity: 3 holes: molten gold 12g silver 6g or molten gold 24g silver 12g or molten gold 36g silver 18g Uses: 1. melting gold and silver or other precious metals 2. test analysis equipment, or ingot mold, etc. Colour:black Material:graphite Package Contents: 1 x Mould Crucible Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.