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A wooden tube is shown, along with two solid brass bolts and a heavy steel ball.

The performer now threads both bolts through the holes in the sides of the tube, and then secures them with the  two brass nuts.

The steel ball is then dropped into the tube by a spectator and it is heard to stop with a  loud thud as the bolts block its passage.

You now allow the spectator to look inside the tube and verify that the  two bolts are preventing the steel ball from traveling through its inner chamber.

On the performers  command, the ball magically penetrates both solid brass bolts and passes completely through the tube.

The tube  is immediately shown and the spectator can see that its inner chamber is still blocked by the crossed bolts.

The effect can be performed completely surrounded.

Only one steel ball is used and it could be marked, if desired.

The two brass nuts and bolts are not gimmicked in any way.

Nine teak wooden parts are used to make each Quantum Tunnel.

Measures approximately 15cms high.

Manufactured in 2013 by Magic Wagon Bangkok Thailand.