Sturdy and reliable: casting ingot crucible moulds are mainly made of graphite material, almost no ash content, to ensure that the metal refining process does not affect the purity of the metal; They are durable and sturdy, reliable and reusable, not easy to break or deform, you can use them for a long timePackage contents: the package comes with 1 piece graphite ingot molds, approx. 85 x 45 x 30 mm/ 3.35 x 1.77 x 1.18 inch in internal size and 100 x 60 x 40 mm/ 3.93 x 2.36 x 1.57 inch in external size, which can hold 2000 g gold or 1060 g silver for casting, meet your demand for quantity, allow you to easily and efficiently purify metal materialsWide range of applications: these graphite ingot molds are widely and commonly applied for experiments and smelting of non-ferrous metals, such as gold, silver, copper, aluminum, and much more, also ideal for satisfying lab, test analysis and other purposes; Taking the product size into account, small-capacity metal melting projects will be more suitableNice performance: these metal casting ingot crucible moulds are completed with exquisite craftsmanship and possess general purpose, can meet your daily needs; They are endowed with thermal stability, fast heating and cooling ability, nice corrosion resistance to strong acid and alkali, their thermal conductivity can shorten melting time and save energy, they are able to withstand the temperature of 2000 degrees Celsius without affecting the moldEasy to use: the inner surface of high purity graphite melting mold is smooth, so you can easily pour out the residual metal and reduce waste, try to use it to possess your metal into geometric shape, and achieve your purposes for metal casting, melting or refining Features: Suitable for DIY: You can use graphite crucible moulds to create many kinds of handicrafts with your parents, friends, lovers, children, colleagues, classmates and others who like to DIY handicrafts, which will strengthen your relationships and enhance your hands-on skills. Reminder: Silver gold ingot mold cannot be heated by carbon furnace or charcoal kiln, it will be oxidized and broken in that case. Pure graphite will be applied in 752 degrees and it begin to oxidize at 400 degrees Celsius. Specifications: Main material: graphite Colors: as the picture shows Internal size: approx. 85 x 45 x 30 mm/ 3.35 x 1.77 x 1.18 inch External size: approx. 100 x 60 x 40 mm/ 3.93 x 2.36 x 1.57 inch Capacity: 2000 g gold/ 1060 g silver Package includes: 1 x 2 Kg graphite ingot molds Notes: Due to manual measurement, there might be slight errors on size, please understand. It needs to be stored in a dry place. Do not touch water after drying. It is helpful to prolong the service life to pay attention to slow heating in the first use.