... light>90% Specification 1. OD:1.2mm-360mm2. thickness of wall:0.5mm-12mm3. type:transparent,translucent,milky-white,red,u ... -shape,twin tube, special shape, etc.4. OEM allowed5. certificate :CE 6. application ... %,OH content less than 50ppm,20ppm,15ppm,10ppm,5ppm Special thick wall quartz tube and clear quartz rod with CE