... 2mm-360mm, Silicon Dioxide>99.95% Transmittance of visible 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 ... device7. technical datasilicon dioxide>99.95%transmittance of visible light>90%,OH content less than ...