F4 Phantom 1/8 scale

Its metal of some kind.  I'm guessing CapnMac82 is probably right he probably used aluminum.  

cnq

That is supere build. I wonder if it's buit from plastic or wood ?

Given that it's 1 1/2" = 1'-0" so, one inch, to scale is 1/8" (0.125" 3.175mm) thick, using actual aluminum would not be out of line.

That is supere build. I wonder if it's buit from plastic or wood ? 

Wow, I'd like to see that in person. 

Now that's pretty darn impressive!