Excellent magnetic coating: triple nickel copper nickel (NiCuNi) coating this gives the viscous magnet a smooth surface to better resist stress and external interventions. Durable and high quality : made with science and technology in accordance with the quality system. ISO 9001. Strong magnets: the grip is incredible, and the attraction of each magnet is no less than 3.1 kilograms, which can be directly touched and directly pulled. of the axial magnetization, and their bonding surfaces are located at the magnetic south pole and at the magnetic north pole! For example, if you need to magnetically connect 2 slime magnets together, that's very useful! Versatility: it has a wide range of uses, from simply putting items on the refrigerator to decorative and creative items used for crafts, most industrial, household, scientific and office uses. The attractiveness and adhesion are strong and high. Please note this is not a toy! Size: 40PC Neodymium Magnets Our neodymium magnets are commonly used in creative applications such as models and theater designs, furniture manufacturing, exhibition stands and packaging. They also have many uses in engineering and manufacturing where compact size and maximum strength are required. Moreover, because they are resistant to demagnetization, they are very suitable for depreciation or grave damping when used to repel other magnets. Uses: home decoration, industrial equipment, electronics, healthcare, jewelry, automotive, art and power amplifiers crafts, hobbies and science projects etc. Magnet Specification: Color: Silver Size: 20X10X2mm Number of Magnets: 40 Material: Neodymium Iron Boron Magnet Note: no not suitable for children. Children accidentally inhale or swallow small objects, there is a risk of choking or choking. It's not a toy. This can damage watches, televisions, computer screens, cell phone pacemakers and credit cards. After-Sales Service: If you have any questions about the packaging or the magnets, please contact us. We will solve the problem at time! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.