Electronic – Female-female connector, but what is it called

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Question

What is the "official" name for this type of connector? (the large black box in the image)

More info…

I need the connection to connect two PCBs together as one was missing from a system that I purchased.

The connection links between the male header pins on two circuit boards and therefore needs to be female-female.

After an extensive search on-line I've come to the conclusion that without knowing what it is called I'm not going to be able to find them.

Diagram of connection

Best Answer

They are officially called Gender Changers but they are commonly referred to as GenderBenders (which may or may not be PC these days...)