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1kg Graphite Crucible for jewellery. Extended Working Lifetime: Lasts 3-5 times longer than normal clay crucibles due to high-pressure compact body. High Thermal Conductivity: High-density body and low porosity ensure faster heat transfer and efficiency. Corrosion and Oxidation Resistance: Advanced process provides superior anti-corrosion and oxidation resistance. High Strength and Density: Logical structure offers better compression properties with bulk density up to 1.91 g/cm3. Eco-Friendly and Pure: Pollution-free material ensures metal product purity and sustainable development. Custom Manufacturing: We produce graphite parts according to customer drawings and specifications.