Help identifying what this port is / does?

2yr ⋅ ⋅

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Supreme x TNF Expedition Backpack FW '17 (9/10 condition)

5yr ⋅

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McPros came in the mail today! Blue one is a little scuffed up for some reason. But overall I can't wait to put these to use!

8yr ⋅

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Pretty cool picture if I'd say so myself.

8yr ⋅

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