... including BK7 glass, other specific glass, Fused Silica, Sapphire, CaF2, etc..BK7 Windows High ... 0mm3.0mm3.0mm6.35mm10.0mmPart NumberWIN1210WIN1212WIN1225WIN1230WIN1250 Fused Silica WindowsHigh Precision!Low Thermal Expansion!Wide Wavelength ... RangeHigh Precision Fused Silica WindowsStandard Fused Silica WindowsSpecifications:Material: UV grade Fused SilicaTransmission ...