Dimatron offer a wide range of graphite electrodes complete with handle and quick change facility for lead attach/detach. The electrode can be easily fitted with felt or caps to suit different applications.
The size of electrode selected is important, obviously for difficult to access areas a smaller electrode will be required and conversely if you have a large stencil area to mark a larger electrode will be preferable. However it is important to not select a marker with too large a surface area for the power unit you are using as this will decrease the effectiveness of the process due to spreading the available current too far over the surface of the electrode, in addition this can also create too much heat and evaporate the electrolyte from the felt. Of course, we are here to help you with this decision so please just get in touch for advice.