100908-mailbox.jpg While taking an afternoon stroll yesterday we happened upon this mailbox. It's on the outside of a large building in the garment district of Kansas City. We always enjoy something out of the norm, but we are stumped as to what the post is made out of? Give us your guess after the jump!

The post almost looks like the metal studs used in construction, although it doesn't have any holes in it (which usually allows the electrical wiring to run through). Do you have a guess as to what they used?