Header pins stackable kit 2x6p/2x8p - Elecrow
Product information:
These headers are made to work with the Arduino Main Board, Arduino Pro, and the Arduino Mega. They have longer contact length 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.