【Magnetic Pole Visualization】Specially designed to reveal the magnetic field distribution and polarity of magnetized materials with clear visibility 【Instant Detection】Simply place the film on the surface of a magnet to instantly observe the number of poles, pole positions, and pole spacing 【Residue-Free & Reusable】Made from flexible, residue-free composite material that can be reused multiple times without affecting performance 【Multipurpose Application】Ideal for quality control, educational demonstrations, R&D, and magnet alignment verification in industrial or lab settings 【Portable and Lightweight】30mm x 30mm dimensions allow for easy carrying, and the magnetic field viewer is designed for on-the-go scientific exploration Specifications: Material: Composite materials Dimensions: 30mm x 30mm Application: Magnetic field observation Function: Visualizes magnetic field lines and pole distribution