... equipment,resonable prices and faultless service will be supplied Quartz Wafers:Raw material:quartzSiO2>=99.99%Color:transparent,colorlessDiameter: ... tolerance:+/-0.05mmMaterial Properties:high purity,highdurablity,both sides polished,high corrosion resistance,high thermal shock resistance,working tempertaure ... :medical,optical industry,eletronics instrment,scientific research clear quartz plate