4 Pieces Graphite Torch ing Casting Kit | Ymiko Graphite Molds Set High Purity Graphite Crucible ComboCRUCIBLE ING METAL KIT CRUCIBLE KIT GOLD ING KIT GRAPHITE TORCH FUSION CASTING KIT: Graphite crucibles have good thermal conductivity and high temperature resistance. In high temperature use, the thermal expansion coefficient is small, and it has a certain strain resistance to rapid heat and rapid cooling. It has strong corrosion resistance to acid base solution and good chemical stability. CRUCIBLE ING METAL KIT GRAPHITE CRUCIBLE KIT CRUCIBLE ING