... Characteristics:1.high purity,2.low coefficient of thermal expansion,3.temperature resistance,4.corrosion resistance,5.extensive optical transmission ... Surface quality :40/20 60/40 80/507, Transmittance >85%8, Coating: high anti-UV film, antireflective film, gold, aluminum ... term usetemperature1100°cDifferent size and shape plates:Service:I will reply your inquiry in 24 hours, pls feel free to contact ...