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I thought it was plastic, I didn't read the fine details. Even better.
The flow is directional though, so you might need to run (2) off a T so one can relieve negative pressure, the other positive pressure (one mounted inverted).
Not sure how it would fare long term with the fumes, but its definitely cheap enough to work something out. Vacuum will find a way to pull no matter the medium.... there could definitely be something to this. Im just about to refill my drums for the winter and I need to find a different...