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Quartz Rod
　　This clear quartz rod has high purity, elevated temperature characteristics and low coefficient of thermal expansion.it serves as the material of the bridging rod for single end halogen lamps,fiber optic lighting ,quartz making ,wafer and push rods in semiconductor indyustry .for detailed specifications and technical data please see tableI，table II.

Dimensional Tolerance （tableⅠ）

0D & Tolerance（mm）	Max.out of Round（mm）
2.0±0.1	0.10
2.5±0.1	0.10
3.0±0.1	0.10
4.0±0.15	0.15
5.0±0.15	0.15
8.0±0.2	0.20
10.0±0.2	0.20
15.0±0.2	0.20
19.0±0.3	0.30

Chemical composition&OH（tableⅡ）

As	Ce	Fe	Mg	Ti	Ca	Al	Na	Li	K
＜0.002	0.05	0.2	0.1	0.1	0.1	14	0.7	0.1	0.6