Shown here are the various stack heights and pin counts that are available. The available DF17 series heights include 5mm, 5.5mm, 6mm, 6.5mm, 7mm, and 8mm. There is also a special 4mm height version, but note that the 4mm height header/receptacle is specific to the 4mm offering. The 4mm parts will not mate properly with any of the 5mm or taller variations.