DescriptionWith Holes : NoApplication : Industrial MagnetComposite : NdFeB MagnetModel Number : 20x10x2mmShape : BlockType : PermanentOrigin : Mainland ChinaCertification : NONEAbout that productShape: BlockSize:Diameter 20mm x 10mm x 2mmMaterial:Neodymium magnetTolerance1.2mmCertification:RoHS passedGrade:N35Max Operating Temperature: 80C/176FPlating: Nickel + Copper + Nickel Triple Layer PlatedUsage:Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on.Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, sound meter, a reed switch, sensors.Electrical field: VCM, CD/DVD-ROM, generators, motors, servo motors, micro-motors,motors, vibration motors.Machinery and equipment: magnetic separation, magnetic crane, magnetic machinery.Studio:bulk magnet can be used to adsorb screws and other parts, even wrenches and other tools.Reminder:1. It can only absorb iron. Not all metals contain iron. For example, the adsorption effect of stainless steel is not good.2. The magnet is fragile. It is made of sintered NdFeB material. It is hard and brittle. Please use it carefully.3.Magnets are easy to be corroded in wet environment, please keep them in dry environment.4: Neodymium magnet is extremely powerful, pls take care of your fingers or other body parts to avoid injured between 2 pieces big magnet5:Prohibit contact and use by children under 8 years old, prevent children from swallowing