Pi Panel Mount Pluggable Terminal Block Breakout Module - for Raspberry Pi.

If you want to build a Raspberry Pi project with outer case, and need external wiring, this will be a good choice.
The item has been soldered and assembled.
Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper.
2x20pins IDC connector, pitch 2.54mm/0.1".
FR-4 fiber glass PCB, dual copper layers, pads grid pitch 2.54mm/0.1", hole diameter 0.8mm.
NOTE: the item not include Raspberry Pi and flat ribbon cable.