Type 32 and 34 cells range from path lengths of 10mm to 100mm with an internal diameter of 19mm. Other diameters available from 5mm ID to 30mm ID on request. Please note when filling cylindrical cells, to avoid damage to the windows, do not fill cell to the top. Leave an air gap otherwise the windows will be broken by the hydraulic pressure of the stopper being inserted. PTFE stoppers are supplied with each cell as pictured.