(A) T3402M - Triode™ Electrode from Thought Technology. With standard 2cm spacing of silver silver chloride electrodes, backed with nickel plated brass snaps to prevent corrosion when connected to pre-amplifiers for extended periods. Comes in package of 100 electrodes.
(B) T3425 - Uni-Gel Electrode from Thought Technology (B in picture) are pre-gelled single electrodes. Ideal for sensitive placements on dry skin. Comes in package of 100 electrodes.