Ideal for studying and analyzing magnetic fields, this tool helps locate magnets in objects with ease. It uses magnetic nanoparticles to clearly show field patterns and strength, making it great for displaying magnetism and identifying strong or weak magnetic surfaces. Observe various magnets, like neodymium magnets, and view magnetic fields in everyday items (e.g., door clasps, phone speakers). Visualize magnetic field lines for different objects and magnets. The magnetic field viewer is made of plastic film with nickel-iron magnetic slurry, displaying magnetization levels and pole distribution. The frame protects the film and allows easy handling. Reusable and self-recovering, simply place it on a magnet to observe the field and determine magnetization direction. **Color:** As shown **Material:** Magnetic nanoparticles **Size:** 14 x 14cm (4 x 4 inches) **Package includes:** 1 x solar film Note: Colors may vary slightly due to lighting and display differences. Size tolerance: +/- 1-3cm.