["Description:\r\n\r\nFeatures:\r\nbrand new and high quality\r\nThis 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.\r\nGreat for personal or scientific research. And it help us study magnetic fields that we can'for t see.\r\nIt can be used for quality control, product demonstration, reverse engineering, authentication and educational purposes. \r\nCompact and portable size, lightweight, convenient to carry with you. \r\nWonderful educational tool to stimulate our interest in science.\r\nMagnetic field viewer is a micro-encapsulated film which makes user view a static magnetic field.\r\nThe highly flexible film suit for magnetic surfaces with any degree of convexity or concavity.\r\n\r\nSpecification:\r\nDimensions: 50x50mm(1.97x1.97in)(approx)\r\nColor: Dark Green\r\nQuantity: 1 pc\r\n\r\nNote:\r\nTransition: 1cm=10mm=0.39inch\r\nNo retail package.\r\nPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.\r\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage includes:\r\n1 x Magnetic Field Viewer(other accessories demo in the picture is not included.)"]