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Various-Sized Quartz Flange Rings Customizable. High Purity Quartz: Made of 99.99% pure quartz with SiO2 content greater than or equal to 99.99%. Customizable Dimensions: Thickness ranges from 0.5 to 100mm with circular or custom shapes available. Superior Light Transmittance: Light transmittance varies between 85% to 95% depending on the spectrum. Chemical Resistance: Resistant to acids and alkalis; does not react with any acid. High Hardness: Achieves a Mohs hardness level of 7 for durability. OEM and ODM Services: Full customization, minor customization, and flexible customization options available.