1. Transparent quartz glass tube Smooth, colorless and transparent, high purity íí(sio2í¦99.99%), corrosion-resistant (expect hydrofluoric acid), high temperature-resistant (intenerating point 1730íµ), good thermal-stability, good light-penetrability (over 93% of visible light), crystal capability(6 hour under the temperature 1400í+5íµ,crystal thickness is less than 100 micron), good insulating-ability, long-life and non-contaminative. Mainly used in protection of heaters, production of halogen tube, lamps. 2. Desoxy transparent quartz tube Nice appearance, good thermal property and mechanical strength, strict tolerance and low hydro-(í_5ppm).Used in mercury lamp, metal halite and other quartz lamps. 3. Non-ozone transparent quartz tube It can prevent high-density ultraviolet radiation by being added titanium-oxide with colorless surface and light-purple section. It can almost prevent ultraviolet radiation no more than 220nm, while penetrates over 83% of 253.7nm, which have strong bactericidal ability. So ití»s called "bactericidal" and "non-ozone" quartz. It is widely used in bactericidal lamp, treatment of water and so on. 4. Uv-filtering transparent quartz tube It has colorless or light-blue surface and light-purple section. Besides common property, it can filter ultraviolet radiation of 190-320nm to prevent harm to bodies. It can be used in most kinds of environmental lighting products.