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Muffle Furnace Spiral Quartz Glass Heating Tube. High Purity Material: Quartz glass purity exceeds 99.9% with OH content as low as 2ppm. Customizable Dimensions: Available in OD 1.5-300mm and max length up to 3000mm. Superior Light Transmission: Visible light transmission rate exceeds 90% for optical applications. Corrosion Resistance: High durability against chemical corrosion suitable for harsh environments. OEM and ODM Services: Full customization available including design, logo printing, and packaging. Comprehensive Certifications: Passed ROHS, CE, MSDS tests and holds ISO9001 authentication. Fast Sample Delivery: Inventory samples delivered within 3 days; custom samples within 15 days.