"Cape Cod Momma" asks about whether Addi Turbos are accepted on planes.
In my experience, you are ultimately at the mercy of the people manning the security checkpoints... I've successfully taken a metal circular on a couple of flights, but it was never one of my good ones.
I'd personally leave the Addis at home and take bamboos, just to be on the safe side.
Looks like KnitPicks has bamboo circulars in the length you're looking for...