Discription: 5pcs 20x5mm N50 Strong Rare Earth NdFeB Neodymium Disc Magnets.    Specification: Material:NdFeB magnetic materials;  Shape:Round/Disc;  Size:Dia.20mm;  Thickness:5mm;  BR:14000-14500 GAUSS;  BS:3020;  Hcj ≥12 KOe;  Hcb≥10.8 KOe;  BHmax:48-51MGOe;  Max Operating Temperature:80℃ / 176℉;  Quantity:5pcs.    Usage: 1. Acoustic field: the speaker, receiver, microphone and so on.  2. Electronics: magnetic relays, meter, sound meter, sensors.  3. Electrical field:  motors, servo motors, micro-motors,motors, vibration motors.  4. Machinery and equipment: magnetic separation,  magnetic machinery.  5. Healthcare: medical equipment, magnetic health products and so on.  6.Perfect for sticking notes on fridge doors.   7. Models piling, you can use small magnets to connect two widgets.  8. Advertising magnets available to replace the original fixtures, at any time convenient to replace the ad content.  9. Studio, bulk magnet can be used to adsorb screws and other parts, even wrenches and other tools.  10. For the overlying metal drawing board for fixing the drawing paper. Magnetic blackboard whiteboard fixed file drawings.  11.Wedding corsage badges, etc., can be replaced with a magnet attracts every other clothes pins, so as not to damage the dress.    Notice: Be careful fragile and  clip hand, placed in a dry place, stored at room temperature   This is a seriously powerful magnet and it is totally unsuitable for children     Package Included: 5x  Strong Disc Magnets