S-Probe, 32ch, stereotrode configuration; 50µm interelectrode spacing, 50 intraelectrode spacing; 125mm total length(30mm; 640µm dia reinforcement tube); 300µm probe dia; 1x CON/32m-V-connector interface; 660µm tip to 1st site; Fiber optic between 6/7 and 11/12. There are 2 optic fibers, but 6/7 fiber is broken, so light passes through on it very weakly.