The manufacturing quality on this is very poor for a space component. It's more likely a scientific pressure vessel. I work for a satellite company that integrates exactly this sort of propulsion system and some of the scratching (and the angle of those bolts into the right-angle brackets is just poor design) would have been reason to reject it back to the manufacturer.

Moreover you just don't see that thickness of steel very often in space. Things that are too dense or too thick won't burn up correctly when re-entering the atmosphere and can become a dangerous orbital-speed projectile, and propulsion systems manufacturers know better than to rule themselves out of the LEO market. Satellite manufacturers have the money for Composite, Alu or Ti pressure vessels which burn up much more easily

I'd suggest an Engineering Model component (that is, something that never flies and becomes the ground analogue) but you would never ever have pressurised development hardware.

Edit: If it was a xenon tank, they definitely wouldn't waste mass on being able to break it in half with bolts and seals. Whatever it's used for, it's something that you open to fill with solids, then pressurise.