Best material pole for 7'x15' vertical hanging banner?

[sdnj]

Wondering what kind of pole (aluminum? wood? PVC? other?) will be best and not bow in the middle for 15' tall by 7' wide vertical hanging banner. Pockets are 2.5". Thank you.

 

[Mosh]

Aluminum, or 1" or 1 1/2" conduit would be alot cheaper.....

 

[the graphics co]

+1 for conduit

 

[Z SIGNS]

Might want to think about the wind load on 105 s/f