Magnetic Field Viewer Pattern Display Membrane Magnetic Card Detector

describe: This project is easy to use. Simply place the card on the surface of a magnetic material and it will display a patterned magnetic field. Great for personal or scientific research. It can help us study magnetic fields that we cannot see. It can be used for quality control product demonstrations reverse engineering certification and educational purposes. Small and portable light weight easy to carry. A great educational tool to spark our interest in science. Magnetic Field Viewer is a micro-encapsulated film that allows users to view static magnetic fields. The highly flexible film is suitable for magnetic surfaces with any convexity or cavity. Specification: Size: 50×50mm 25×25mm 30×30mm Color: yellow Effect: True Color Gray Quantity: 1 piece Package Included: 1 Magnetic Field Viewer Transition: 1cm=10mm=0.39inch Due to manual measurement please allow 1-2 cm error. Make sure you don t mind before bidding. Due to differences between different monitors the image may not reflect the actual color of the item. Thanks!