Borosilicate Glass (3.3)

Features:
1) Coefficient of mean linear expansion: 3.3±0.1 
    (10-6K-1)
2) Transformation temperature: 52±510°C
3) Working point: 1,260±20°C
4) Softening point: 820±20°C
5) Refractive index: 0.92
6) Glass tubing: Φ5 - Φ315 x 1,500mm
7) Glass rods: Φ5 - Φ60 x 1,200mm
8) Low expansion, high strength and hardness, long durability, heat resistance
    and scratch proof
9) Used in instrument, chemical pipelines and handicraft articles
10) GT glass is widely used to produce borosilicate glass, pharmaceutical
    glass and lighting glass