This cell was designed for strong alkaline work, where base concentrations > 0.5 M and traditional borosilicate cells will be attacked by base. The cell is machined from solid PTFE, with recess to guard the RDE/RRDE surface from touching the cell with full shaft immersion. The OpenTop cell includes a fluoroelastomer gasket for sealing the lid (sold separately). The overall volume of this cell is 175 mL. It is sold as part of a Rotating Disk/Ring-Disk Alkaline Resistant Cell Kit (including lid and clamps). This product is only the cell, as a replacement or additional cell if you already own the alkaline resistant cell kit.