Zinc Selenide Semi-Demountable Cell Windows, Thickness: 2mm, One Pair. Zinc Selenide (Irtran-4™). Irtran-4 is similar to Cleartran except that it is somewhat softer and more easily scratched. Irtran-4 is used in total reflectance accessories because of its high refractive index.
- Model: L1270765
- Manufactured by: PerkinElmer