20 inch dia, 1/4" wall , ill put it aside for a future build, but im more interested in the end cap on the left. What a perfect circle guide for the plasma for 18" and 20" circles!
I'm thinking that would make a Sweeeet little mini smoker!
Maybe have the CC door on the end opposite the firebox with a pull out grate. You could make the door be the top half of the end plate that swings down on a hinge placed across the middle of the end plate.
It would also make a good trash can for the shop!
I'm gonna agree with Ribwizzard and say that it is a "~~ Klingon warp generator " and that it will make an out of this world smoker of some kind!