About This

• 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 personal or scientific research. And it help us study magnetic fields that we can'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.