... stability (thermal expansioncoefficient 5.5x10-7 / ° C, the quartz tube heated to 1100 degrees Celsius, and then placed inroom ... customers customize (1-160ppm).Widely used in halogen lamps, mercury lamps, metal halide lamps, photocopiers lamp, stagelights, light sources and chemical ... needs of customers to develop appropriate specifications. Twin quartz tubes /Quartz Glass tubes with high quality