material: main material is graphite, the ash content is less than 0.1 percent, ensuring that the metal will not be affected during metal refining; Rapid cold and hot use conditions, with thermal stability, better refining effect than silicon carbide graphite crucibles characteristics: it has thermal conductivity, which can greatly shorten the melting time and save energy, and withstand 2000 degrees Celsius, acid and resistance, corrosion resistance, impact resistance, 89 MPA compression resistance, and 48.7 MPa flex resistance Widely applicable: the mold can be applied for experiments and smelting of non-ferrous metals, such as gold, silver, copper, aluminum, lead and so on; It can also be applied as graphite crucible melting into non-ferrous metals, test analysis, as the ingot mold and other purposes; Considering the size of this product, it is more suitable for small-capacity metal melting. Ingot mold size: outter is 100 x 50 x 25 mm, inner is 90 x 40 x 20 mm; Melting and casting metals like gold, silver, brass, aluminum, copper, zinc, plumbum, and more; The capacity is an approximate volume is 1 kg hold or 500g silver What you receive: there are 2 pieces of graphite ingot molds in this package, enough to use, improving your work efficiency in Colour:black Material:graphite Size:90 x 40 x 20mm 100 x 50 x 25mm Package Contents: 2 * Graphite Ingot Mold Only the above package content, other products are not included. Note: Light 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.