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Description

This item is easy to use. Just place the card on the surface of the magnetic material and it will reveal a magnetic field of pattern..Great for or scientific research. And it help us study magnetic fields that we can'for t see..It can be used for quality control, product demonstration, reverse engineering, authentication and educational purposes..Compact and portable size, lightweight, convenient to carry with you..Wonderful educational tool to stimulate our interest in science.

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