OD range 2.2mm-80mm,Silicon Dixiode >99.98%,using high pure arenaceous quartz,it has excellent visual and chemical performance ,high thermo-stability , anticorrosive.
　　Transmittance of visible light>90%,especially at 185nm,it >67%,producing all kinds of ozone lamps and so on.
　　And Dehrodyolization available upon customer request, OH content less than 5ppm or 2ppm.