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an Innovative and Hydrophobic Sapphire Glass Optical Lens for Outdoor Instruments. Superior Hardness: Mohs hardness of 9, second only to diamond, ensuring extreme scratch resistance. Customizable Options: Supports full customization including shape, size, coating, and polishing grade. Chemical Resistance: Excellent stability; insoluble in water and resistant to strong acids and bases. Multi-Industry Application: Suitable for medical, aerospace, semiconductor, and high-end consumer electronics. Quality Certified: RoHS and ISO9001 certified with 100% finished product inspection.