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High Purity Quartz Crucible for Reliable Gold Melting Performance. High Purity Quartz: SiO2 content exceeds 99.5-99.7% for superior performance. Customizable Capacity: Capacity can be tailored to specific customer requirements. Silicon Coating: Features a silicon coating for enhanced durability. OEM/ODM Support: Offers full customization from samples, designs, and minor adjustments. Secure Packaging: Tailored packaging protects products from impacts during transit. ISO9001 Certified: Manufacturer holds ISO9001:2015 management system certification. 100% Inspection: All finished products undergo strict visual inspection.