... carve the mold. If we using normal copper for spark eletrode, copper eletrode will be consumed fastly, and veracity ... spark erosion, we strongly recomand our tungsten copper electrode. More formular tungsten copper electrode will be supplied on request, ... :High Voltage Arc Contacts, Vacuum Contacts, Electrodes for Resistant Welding and Spark Erosion. tungsten copper spark electrode bars and bricks