This is clear fused quartz glass tube has the typical characteriastics of high purity, good spectral transmission ,well controlled dimension and lower OH and so on .It serves as the first choice for heat resistant materials for halogen lamps ,mercury lamps ,metal halide lamps and other quartz lamps .this glass can be supplied in the rang of 3-80mm outside diamerer,0.6-2.0mm wall thickness and 1200-1500 length .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 within20ppm/15ppm/10ppm/5ppm/2ppm  according  to the requirement of customers.