PL259 Calibration Kit for NanoVNA

I need an SMA male to SO239 patch cable for using NanoVNA as my antennas terminate in PL259 connectors. Calibration is done using a PL259 Calibration Kit for NanoVNA, if an SMA male to SO239 patch cable is used. Calibration with the SMA connectors alone is not enough. We need PL259 load 50 ohms, PL259 short and PL259 open for calibration. PL259 load 50 ohms has two 100 ohms resistors in parallel, connected to the PL259. But I thought of buying a readymade kit with all the three types of PL259 connectors.

This is the PL259 load 50 ohms which I received as part of the PL259 Calibration Kit for NanoVNA. This kit does not come with the NanoVNA. We have to make it or purchase separately.

Here is one end of the PL259 open connector. Have a close look at the inner conductor.

This is the reverse side of PL259 open connector. You can also see the PL259 50 ohms load beside it.

See the PL259 short. Inner conductor looks different.

The other side of PL259 short is also quite different from the PL259 open. Lower one is the PL259 load. All these three connectors are used instead of the corresponding SMA connectors during calibration of NanoVNA.