Microprobes for Life Science offers a variety of popular and fully-customizable concentric electrode designs to meet your research needs. The inner electrode features one of three available metals, and an outer electrode is made of stainless steel. The CEA Tapered Tip models are precision ground to a pencil point for improve tissue penetration, while the NE Rhodes-Style Tip models feature cylindrical stepped tips to allow for carefully controlled contact surface areas. The lengths of the different layers of the Rhodes-style electrodes can be customized to provide a great degree of control over probe surface area and impedance.