CNBTR 30x30mm High Purity Graphite Crucible Torch Melting Casting Mould for Metal Melting Pack of 2 Made of Graphite,high quality Graphite Crucible High Purity,Durable and practical,Good quality of Processing, smooth finish Have good thermal conductivity and high temperature resistance. Note: This product can not be placed directly in the fire to smelt, need to use with high-frequency heating furnace!