Induction Graphite Crucible Graphite Furnace Graphite Crucible Quartz Protection Sleeve QuartzHigh purity graphite: 99. 9% high purity graphite and 1. 8 1. 82g cm3 high density, the ash content is less than 0. 1% to ensure that the noble metal in the smelt is not contaminated, our crucible is not easy to dopically in the smelting process, which can be used Melting high purity precious metal Magical thermal conductivity: This small graphite crucible has excellent thermal conductivity, which can highly shorten the melting time and save energy.