The has 3 rectangular slots and 2 round holes, suitable for melting and casting bars or coin metals, gold, silver, copper and other alloy tool steel, please check the size before purchasing. Reliable material: mainly made of graphite, these molds are with hardness 51 HSD, 89 MPA compression resistance, 48.7 MPa flex resistance, bulk density 1.86 g per cubic cm, ensuring that the metal purity will not be affected during metal refining; Nice thermal conductivity and corrosion, well heat transfer. Different usages: graphite casting ingot can be applied for experiments and smelting of non-ferrous metals, including gold, silver, copper, aluminum, lead and so on, which can also be applied as graphite crucible melting into non-ferrous metals, test analysis, as the ingot and other purposes; Considering the size of this product, it is more suitable for small-capacity metal melting. Works well: nice thermal stability for withstanding 2000 degrees Celsius, fast cooling, nice corrosion resistance to strong acid and alkali, nice thermal conductivity properties which highly shorten the casting and save energy; It keeps its natural graphite of various physical and chemical properties; This is Perfect for making several bars at the same. Nice temperature resistance: graphite crucible let the products more durable than ordinary material products, which can withstand more than 2000 degrees Celsius high temperature. Colour: Black Material: Graphite Package Contents: 1 * Graphite molds for casting 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.