Description: Strong magnetic NdFeB;  Circular Disc Magnets are made from Neo Neodymium Magnet material and have strong magnetic performances.  Super strong Rare-Earth magnets - once they get stuck with each other, they are hard to break apart. You should be careful to break apart not  use strong power  to pry open   or   it  would cause damage and cracks in the magnetic material.    Features: Shape: Disc;  Grade:  N52;  Plating:  Ni-Cu-Ni ( Nickel );  Max Temp (degrees C):  80;  Material:  NdFeB;  Color:  Silver;  Magnetic face diameter: 20mm;  Thickness: 10mm;  Quantity: 1 pcs;     Applications: Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on.  Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, 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.  Healthcare: MRI scanners, medical equipment, magnetic health products and so on.  Other industries: magnetized Wax, pipe descaling, magnetic fixture, automatic mahjong machine, magnetic locks, doors and windows.  magnetic, magnetic luggage, leather magnetic toys, magnetic tools, gifts and packaging.    Tip: 1, Strong magnets should Keep away from Ironware and some  easily magnetized iron products, such as monitors, bank cards, computers, televisions, mobile phones and other;  2, Strong magnets should be stored in a dry, heated environment, and need to use of plastic, wood, cardboard, foam to separated and wrapped.  3, Magnets might be interested in water meter ,Electric meter, gas meter and some metering equipment exist some inaccurate affect (Such as : if magnets placed near  the meter, the meter will slow down).     Note: Be careful fragile and  clip hand, placed in a dry place, stored at room temperature   WARNING: This is a seriously powerful magnet and it is totally unsuitable for children   Recommend Age:8+     Notice: DO NOT  EAT.      Package Included: 1 x Strong magnetic NdFeB