Clear glass tube is industrial use standard melting clear quartz glass tube, SiO2 is greater than 99.9%, good stability, corrosion resistance, spectral through rate is high, the most of all, price is reasonable. Clear glass tube mainly used for electric light industry, parts used in semiconductor, optical fiber and chemical industry. Quartz glass tube did not take off the hydroxyl used in tungsten halogen lamp, heater, chemical industry, equipment high temperature resistant products, hydroxyl quartz glass tube ( slower hydroxyl) used for high-pressure mercury lamp, UV lamp. The vacuum hydroxyl quartz glass tube (low hydroxyl quartz glass tube) used for Blister of metal halide lamp. We can produce diameter between 1 mm-300 mm of all kinds of hydroxyl quartz glass tube, hydroxyl can be controlled in less than 20 PPM, 10 PPM, 5 PPM.