The Milwaukee MA73075 is the replacement EC/TDS replacment probe with built in temperature sensor for the T75 PRO Tester and C65 EC Tester (sold separately).
The Milwaukee MA73076 is the replacement EC/TDS replacment probe with built in temperature sensor for the T76 PRO Tester and C66 EC Tester (sold separately).
These replacement probes easily slide into the tester fitting then screws into the meter body for secure installation.