This is a NEW EEG Electrode. We developed this design ourselves, with extended (5mm) prongs to accomodate longer hair.
This disposable/reusable Dry EEG Electrode can also be used for other parameters such as EMG, ECG or EOG. It is used with the TDE-207XX Lead Wire.
Diameter at the bottom is 13/32″. Top diameter is 1/4″. Spike length is 5mm.
There is a narrower notch just below the top, for the electrode cable to snap into. That notch is 7/32″ in diameter.