... :1100C=2012FCharacteristics and superiority 1, Shape:Round, square, rectangle;2, optical silica sheet: ZS-1 ZS-2 HS / JGS1 JGS2 JGS3 ... film, antireflective film, gold, aluminum, silver series quartz glass and quartz UV filters, curved reflector, filter glass and so on. PurityTotal Impurities, including Al ...