These headers are made to work with the Arduino Uno R3, Leonardo and new Arduino boards going forward. 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, 1 10-pin and 1 6-pin), enough to connect a shield to an Arduino board. These are the same headers we use in our tutorials and with our own shields.
Note: If you have a board that does not use the Arduino R3 architecture which include the OREF, SCL, and SDA pins they can be found here. We know that many boards still do not use the R3 layout so we like keeping that kit available for those situations!