Specifications:When connecting two magnetic buttons, draw them close to each other slowly and gently.Hard crushing would cause damage and cracks in the magnetic material.These magnets are made from neodymium magnet material and have unbelievable magnetic performances. Usage:1. Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on.2. Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, sound meter, a reed switch, sensors.3. Electrical field: VCM, CD / DVD-ROM, generators, motors, servo motors, micro-motors,motors, vibration motors.4. Machinery and equipment: magnetic separation, magnetic crane, magnetic machinery.5. Healthcare: MRI scanners, medical equipment, magnetic health products and so on.6. Wedding corsage badges, etc., can be replaced with a magnet attractsevery other clothes pins, so as not to damage the dress.7. For the overlying metal drawing board for fixing the drawing paper. Magnetic blackboard whiteboard fixed file drawings.8. Advertising magnets available to replace the original fixtures, at any timeconvenient to replace the ad content.9. Models piling, you can use small magnets to connect two widgets.10. Studio, bulk magnet can be used to adsorb screws and other parts, even wrenches and other tools. Type: Neodymium MagnetGrade: N52Material: NdFeB Magnetic MaterialsShape: RoundSize: 30mm x 30mm/1.18" x 1.18" (Approx.) Notes:This is a seriously powerful magnet and it is totally unsuitable for childrenDue to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Neodymium Magnet