Superior Silica Sand for Glass/Water Treatment/Refractory/Construction/Chemical 4~400mesh. High Purity Silica Content: SiO2 content reaches up to 99.89% with minimal impurities like Fe2O3 and CaO. Wide Mesh Size Range: Available in 4 to 400 mesh sizes to suit various industrial applications. Chemical Stability: Insoluble in acid and highly resistant to corrosion and chemical degradation. Hard and Wear-Resistant: Hardness of 7 with high durability, suitable for abrasives and construction. Flexible Customization: Offers full customization and flexible options based on specific samples. Versatile Industrial Applications: Ideal for glass, water treatment, refractory materials, ceramics, and construction. ISO Certified Quality: Product meets ISO certification standards for quality and consistency.