V-Probe, 24ch, 15µm elect dia, 100µm electrode spacing, 100mm total length(30mm; 640µm dia reinforcement tube); 210µm probe dia; CON/32m/v connector interface; 470µm tip to 1st site; Channels 1, 2, 3, 4, 5, 6, 12, and 19 are not working.