Reliable material: Our graphite are mainly made of graphite, with an ash content of less than 0.1 percent , ensuring that the metal purity is not affected during the metal refining process fast hot and cold conditions and good thermal conductivity, which can greatly shorten the melting time and save energy Excellent performance: Our ingot mold has good thermal conductivity, can shorten melting time, save energy, is temperature resistant to 2000 degrees Celsius, acid and resistant, corrosion resistant, and impact resistant Wide application: The smelting mold has a wide range of applications and is suitable for experiments and smelting of non-ferrous metals such as gold, silver, brass, copper, aluminum, zinc, etc. It can also be used for testing analysis tools and ingot for making bars or necklace pendants. Size Details: Our casting come in 4 sizes, measuring approximately 4.13 x 1.38 x 0.79 inches or 105 x 35 x 20mm, 3.54 x 0.71 x 0.87 inches or 90 x 18 x 22mm, 3.54 x 1.57 x 0.79 inches or 90 x 40 x 20 mm, internal dimensions 3.94 x 0.98 x 0.94 inches or 100 x25 x24 mm to meet most of your melting or casting metal needs Packing: The package contains 4 metal casting , 4 sizes, which can meet your for making necklace pendants You can also invite your friends or family to enjoy the fun of hand-making Material: graphite colour: Black Package Contents: 4 x Graphite ingot mould(Outer 100x50x25 or inner 90x40x20mm outer 100x30x30 or inner 90x18x22mm outer 125x50x30 or inner 105x35x20mm 120x40x30 or inner 100x25x24mm) 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 picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.