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By certification 
This standard quartz lamp tubing is a kind of clear electrically fused machine-drawn tubing. It has characteristics of excellent visual, thermal, mechanical properties with tight dimensional tolerances. This material is available in a full range between 2mm and 200mm outside diameter. The hydroxyl (OH) content can be adjusted to different level according to its application.
Appilication
Light, sources, semiconductor, optical, communications, military, buildingmaterials, chemical, mechanical, electrical, environmental protection and other fields.
Advantage
High Durability
High heat resistance
High Corrosion Resistance
Low Thermal Expansion Coefficient
http://www.refractory-ceramic.com/
