Product Description CaF2 brewster prism Dimension Tolerance :+/-0.1mm Surface Faltness :1/4L@ 633nm Surface Quality :40-20 Our main products include lens made by : 1. various kinds of crystal materials, such as ZnSe, CaF2, Ge, Si, ZnS, BaF2, GaAs, MgF2, LiF, Copper Mirrors, Mo, Sapphires, Quartzs, Ceramics , YAG, etc 2. various kinds of glasses material including crown glass, flint glass, lanthanum glass, etc. Our products can service you well in military area or medical, photoelectric, telecom, etc. We can make special order according to your special require on both making or repairing.