Vacuum “tree”? Name that part!
Vacuum lines don't need clamps - the atmosphere keeps them pressed against their nipples. Those are coolant lines, bringing hot coolant to the PCV valve (that's the name of the part) to keep the goo fluid enough not to gum it up.
it’s connected to the pcv by a hose but it’s actually not a pcv. ford dealer has it listed as a “vacuum tube connector”BAM
Hard to say with so little info about the truck, the engine, its history, how it's running, or what prompted you to look at this. Put ALL the truck's details into your signature as this page explains:
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And the pic is too close-up. Back off & post a few more showing what's around that area within reach of that tube.
(click this text)
And the pic is too close-up. Back off & post a few more showing what's around that area within reach of that tube.

