Unknown wing dimensions question.

[Maxray]

Hi Guys,
For the life of me, I cannot determine out what this strip is made of (Spruce or Ply) and what the dimensions and exact location are in my plans.
Help!
Thanks guys.

[Tom XL-7]

I have an old xl set-number 7     
on page 37 it was originally shown as 1 mm x 1.5" ply
I have changed it to 1.5 mm x 1.25"
did not note the source of the change
Hopefully your page 37 has info

[Maxray]

Hi Tom,
Thank you buddy! I did locate it on page 37 as you said. I guess I need new glasses as it looks like
it says 1mm x 1-1/2". That's what must have thrown me off. 
I'm going to go with 1.5mm x 1-1/2"