DescriptionOrigin : Mainland ChinaShape:DiscSize:6x1mmTolerance:+-0-2mmMaterial:Nd-Fe-B magnetsGrade:N35BR:14000-14500 GAUSSHcj12KOeHcb10.8KOeBHmax:48-51MGOEeMax Operating Temperature: 80 Celsius degree / 176 Fahrenheit degreePlating: Nickel+Copper+Nickel triple layer platedFeatures: Super strong rare earth neodymium magnets -they are hard to separate once they get attracted with each other. It\'s perfect for wind generators, DIY projects, science projects etc.Caution: strong magnets are brittle; strong magnet could pinch your fingers badly; if you allow two magnets attract together, it may cracks and the chips could hurt your eyes.(The pull force was tested at 20 Celsius degree, on a polished iron plate with a thickness of 20 mm. The magnet was deducted vertically. A difference of up to -10% compared to the specified value is possible in exceptional cases.)Note:1: Neodymium magnet is extremely powerful, pls take care of your fingers or other body parts to avoid injured between 2 pieces big magnet2: Neodymium magnet is very fragile easy damaged, pls handle gently The. Strong magnets is made of rare earth at high temperature, and it is impossible to guarantee 100% perfection. Its small flaws will not affect its performance and use.3: Strong magnets should keep away from ironware and some easily magnetized iron products, such as monitors, bank cards, computers, televisions and mobile phones4:Prohibit contact and use by children under 8 years old, prevent children from swallowing