... Si,ZnS,quartz, Sapphire,etc 2.size:mm to 50mm 3.rface quality:80/50 to 20/ ... meet your specific requirements. MaterialBK7 etc optical glass to IR CaF2,MgF2,Ge,ZnSe,Mono Si ... ,ZnS,quartz, Sapphire,etc crystal materials. SizeΦ2 –Φ120mmDimensiontolerance± 0.1mmSurface quality10/5,20/ ... ChipCoatingUncoated, AR, HR, PR coating, etcAppearanceRestangular,square,circle,wedge,oval etc We believe that we will ...