1.Diameter tolerance:+/-0.01mm 2.Angle tolerance:5''-3' 3.Materical:Bk7,K9.Si,Ge,Caf2,sapphire,Znse,GaAs,Zns Optical Windows We are fully committed to designing and making all kinds of optical components for customer special useMaterialBK7 etc optical glass to IR CaF2,MgF2,Ge,ZnSe,Mono Si,ZnS,quartz, Sapphire,etc crystal materials. SizeΦ2 –Φ120mmDimension tolerance± 0.1mmSurface quality10/5,20/10 ...