Ah, was only asking because in that last pic it looks kind of flat like Air, but the other way around. Think it's just from the angle of the pic and the lighting on the tube.
Ordinary round tubing, indeed. ;-)
@WimVDD started
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Ah, was only asking because in that last pic it looks kind of flat like Air, but the other way around. Think it's just from the angle of the pic and the lighting on the tube.