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quartz tube/opaque quartz tube/milky white quartz tube big diameter quartz tube >99.9purity ISO 9001:2000 ISO 14001:2004 1. Material properties High Purity Material High Durability High Corrosion Resistance Broad Transmission Spectrum Low Thermal Expansion Coefficient Working temperature: 1100°C=2012°F 2. Size MAX Diameter: 700mm We also produce Clear Quartz Tube, Translucent Quartz Tube, Ozone free quartz tube, UV block quartz tube, Red quartz tube, Gold coated quartz tube etc. We can make products according to the requirements of our customers. It is our desire to have the pleasure of serving you.