... polished4.shape:sauqre,round,rectangler and arch etTransparent Quartz glass plateHeat resistant temperature:1200 degree CThe thickness:0.5 ... round quartz plate,rectangular quartz plate,quartz panelUsed for window material,mask substrate or heat insulation,optics,electronics, ... treatment,laser industries ect.Characteristics:1.high purity,2.low coefficinet of thermal expansion,3.temperature resistance,4. ...