UV-stop Quartz Glass Tube This CE doped glass can be stop nearly all the radiation of ultraviolet ray of UV-B & UV-C and big proportion radiation of ultraviolet ray of UV-A. It is an ideal material which stops ultraviolet ray and set out maximum visible light. It serves as the material of quartz halogen lamps, high density discharge lamps and other UV light, which prevent the harm to the skim of the people and the things which has to be under the exposion of UV radiation and set out the maximum visible light at the same time. This is clear fused glass tube available as continuous machine drawn and automatic controlled tubing. This glass has the typical characteristics of high purity, good spectral transmission, well controlled dimension and lower OH and so on. It serves as the first choice of heat resistant material for halogen lamps, mercury lamps, metal halide lamps and other quartz lamps. This glass can be supplied in the range of 3-80 mm outside diameter, 0.6-2.0 mm wall thickness and 800-2400 mm length. Exhaust tubes with good CPK are suitable for high-speed streamline production. And further processing of trim cutting, fire polishing, bending and pinching can be done according to the requirement of customers. OH-content can be controlled within 20ppm/15ppm/10ppm/5ppm/2ppm according to the requirement of customers.