These are extra long .1 inch (2.54 mm) pitch headers; every workshop should have a good collection of these on hand. There are two distinct types with different purposes:
Type “A” – these have 6mm pins on both sides and work well as header gender changers.
Type “B” – these have extra-long 9mm pins on one side, which makes them ideal for shields and daughterboards where you want male headers on both sides of the board. When soldered into a standard 0.0625″-thick board, you’ll have 6mm of pin height on both sides.