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.Shape: BlockMaterial:Neodymium magnetTolerance:±1.5mmCertification:RoHS passedGrade:N35Max Operating Temperature: 80C/176FPlating: Nickel + Copper + Nickel Triple Layer Plated