4mm Banana Jack Plug Connector, Female (Black & Red Pair)

Rather than leaving bare wires or a soldered connection exposed on a project's exterior, these panel-mount banana jacks give a finished enclosure proper sockets that accept standard 4mm banana plugs, the same connector style used on multimeter leads, bench power supply outputs, and audio amplifier speaker terminals. The black-and-red color pairing follows the universal negative/positive convention, making polarity obvious at a glance for anyone connecting a test lead or power cable to the finished project without needing to check a wiring diagram first.