This is Sparkfun part PRT-10007.
These headers are made to work with the Arduino Main Board, Arduino Pro, and the Arduino Mega. They are the perfect height for clearing the USB-B connector and great for stacking multiple shields. This kit includes 4 headers (2 8-pin and 2 6-pin), enough to connect a shield to an Arduino Main Board. These are the same headers we use in our tutorials and with our own shields.
Note: these connectors don't support the OREF, SCL, and SDA pins as found on R3 revision Arduino Uno boards.
This is a brand-new, old-stock item that has been in storage. Full warranty and technical support. Click here to learn more.