The Amphenol 68653-436HLF is a 36-position, single-row unshrouded male pin header from the BergStik® II series, on the standard 0.100" (2.54mm) pitch. It's a board-to-board interconnect: the long 0.540" mating pins and 0.095" solder tails let it stack two PCBs at a set height, with the unshrouded design keeping the footprint tight.
The 36 positions are fully loaded (all positions populated), so your BOM circuit count needs to match exactly. The 0.540" mating pin length gives you roughly 13.7mm of engagement depth, which sets the stack height between the two boards.