For photometry and spectrophotometry. From the description of each cell model you can find out it's composition and therefore it's transmission range: - OG: Optical glass (360-2500nm) - OS: Special optical glass (320-2500nm) - QS: Quartz SUPRASIL (200-2500nm) Technical Data: - Height: 45mm (with stopper 46mm) Here are described only the most commonly used cells. Paired cells are available. The reference of a paired cell is constructed by replacing the first zero after the dash by a 2. For example, the paired cell corresponding to the cell with the reference 048-200404 would be 048-220404.