DescriptionOrigin : Mainland ChinaShape: rectangleSize: 10x5x2mm-20x15x3mmTolerance:+- 0-2mmMaterial: Nd-Fe-B magnetGrade: N35BR: 1400-14500 GaussHcj12KOeHcb10.8KOeBHmax:48-51MGOEeMaximum operating temperature: 80 C/176 FCoating: nickel+copper+nickel three-layer coatingFeatures: super rare earth neodymium magnet - once it attracts each other, it is difficult to separate. It is very suitable for wind turbines, DIY projects, scientific projects, etc.Attention: strong magnet is fragile; Strong magnets will squeeze your fingers seriously; If you let two magnets attract together, it may crack and the fragments may hurt your eyes.(Test the tension on a polished iron plate with a thickness of 20 mm at 20 . Subtract the magnet vertically. In special cases, the difference may be as high as - 10% compared with the specified value.)Note:1: Neodymium magnet is very powerful. Please pay attention to your fingers or other body parts to avoid injury between two large magnets2: Neodymium magnet is very fragile and easy to be damaged. Please handle it carefully. The strong magnet is made of rare earth at high temperature, which cannot guarantee 100% perfection. Its small defects will not affect its performance and use.3: Strong magnets should be kept away from ironware and some easily magnetized iron products, such as monitors, bank cards, computers, televisions and mobile phones4: It is forbidden for children under 8 years of age to contact and use it to prevent children from swallowing