Microelectrodes consist of small diameter metal wires or fibers (5-100 µm) sealed within tempered glass bodies. The flattened end of the microelectrode is polished to a mirror finish, which can be maintained using the polishing materials contained in the PK-4 Polishing Kit. The electrical connection is a 0.060" gold-plated pin. Dimensions of the electrode are approximately 7 cm long and 4 mm OD. Each microelectrode is visually inspected and electrochemically tested before shipping.