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how to make metal Magnetic Repulsion

how to make metal Magnetic Repulsion

how to make metal Magnetic Repulsion


I'm building a pipeline with two magnets opposite each other in the same polarity and actually repel each other. I wanted to put between the magnets, metal pellets from in a thought that one of the poles will reject the pellets(north or south) But I've seen that both poles attracts the pellets.
Is there a way to make magnetize reject the pellets so that they will be restless between two magnets or even run back and forth to one another magnet?
Is there a spherical magnet with only one pole?
Any other solutions?

Thank you for the help,

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