SMA male to BNC Female pigtail cable
This is a SMA to BNC adapter cable.
It is 22cm (9 inch) long end-to-end.
The SMA male connector fits most of my products.
Using a small "Pig-tail" cable like this is useful when you have a thick cable with a BNC that needs to connect to a SMA.
Using a short cable instead of a direct adapter means the strain from the thick cable will not be transferred to the SMA connector in the transmitter and possible break it.