Copper cathode.
Copper cathode.
Copper cathode.
Copper cathode.
Copper cathodes.
Copper cathode.
Copper cathodes.
Copper cathodes.
Copper cathodes.
Copper cathode.
Copper cathode.
Copper cathode.
Copper cathodes.
Copper cathode.
Copper cathode.
Copper cathodes.
Copper cathode.
Copper cathode.
Copper cathode.
Copper cathodes.