Platinum Iridium Metal Electrodes Profile C , 305 mm longItem Length Insulation Thickness Shaft Diameter Nominal Impedance 20% Tip Diameter Typical Use Quantity PTM123B05KT 305mm 3 0. 37mm 0. 5M 1 2 Deep brain studies Package of 3 Platinum Iridium Profile C, 305 mm PROS Lower Concomitant Impedance This probe has lower concomitant impedance compared with tungsten and stainless steel. Higher Charge Transfer Capacity Making it perfect for microstimulation, Pt Ir electrodes have a higher charge transfer