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Any conductive material for the tube will have a similar effect. It isn't specific to copper.

The moving magnet induces a current in the tube which in turn creates the magnetic field that interacts with the magnet.

Not any conductive material, obviously won’t work won’t work, nor magnetic steel / stainless steel alloys.

I meant: obviously iron won’t work.

Could you elaborate why iron pipes wouldn't work?

The magnet would try to stick to the side of the pipe through "normal" magnetism.

I see, thanks!

Eddy currents

“Eddies,” said Ford, “in the space-time continuum.”

“Ah,” nodded Arthur, “is he? Is he?”