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Customized High Purity 20-50 Mesh Fused Silica Sand. High Purity SiO2: SiO2 content exceeds 99.95% with minimal impurities like Al2O3 and Fe2O3. Near Zero Thermal Expansion: Features extremely low thermal conductivity and excellent thermal stability. Customizable Color: Available in White or Transparent options to meet specific requirements. OEM/ODM Support: Full OEM and ODM services available for customized production needs. ISO Certified: Product meets ISO certification standards for quality assurance. Versatile Applications: Suitable for ceramics, casting, and refractory materials industries.