Electronic – Please help me identify this connector type

It's a female pin header, most likely 0.1"/100mil/2.54mm (but use your calipers to verify). The little metal pins are for soldering into a PCB, whereas the corresponding male connector plugs into the contacts embedded within the plastic housing.

Also note that they are available in "stackable" form, where the metal pins are long enough for the connector to act as both male and female; these are used on both PC/104 expansion boards and Arduino shields so that they can be stacked multiple devices high.

That connector looks very like a JST XH connector

The pitch is 2.5mm.

The JST web site can be searched for 'XH' here Or the JST XH series is here.

There is a link to a downloadable PDF but it isn't clear that it is stable for the long term, so this link may break.

The engineering drawing "Through-hole type shrouded header", page 3, is 7mm high.

The datasheet has another drawing which says 9.8mm high on page 1, but that shows a plug in a socket, that drawing also shows 7mm as the height of the socket