The has 3 rectangular slots and 2 round holes, suitable for melting and casting or coin metals, gold, silver, copper and other alloy tool steel, please check the size purchasing. material: mainly made of , these molds are with hardness 51 HSD, 89 MPA compression resistance, 48.7 MPa flex resistance, bulk density 1.86 g per cm, ensuring that the metal will not be affected during metal refining; thermal conductivity and corrosion, heat transfer. Different usages: 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 crucible melting into non-ferrous metals, test , as the ingot and other purposes; Considering the size of this product, it is more suitable for small-capacity metal melting. Works : thermal stability for withstanding 2000 degrees Celsius, fast cooling, corrosion resistance to strong acid and , thermal conductivity properties which highly shorten the casting and save energy; It keeps natural of and chemical properties; This is Perfect for making at the same. temperature resistance: crucible let the more durable than material , which can withstand more than 2000 degrees Celsius high temperature. Colour: Black Material: Package Contents: 1 * molds for casting Only the above package content, other are not included. Note: Light 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. 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. Sold by-YJL official store