If it was a traditional-style drum, normal aluminium tubing would be fine. It's usually the preferred option in antweights I think as steel tubing is probably too heavy.

But with a drum of the above design, I don't know how well it will work. I've heard that the metal-based 3D printed objects tend to be much more brittle than their 'normal' counterparts, so it's a possibility that that drum could shatter from an impact.

Can't provide much more info apart from that though; one of the antweight guys may be able to shed better light on it.