circular disc magnets are manufactured in & rsquo; s & agrave;?from solid materials neon magnets - neodymium and magnet shows.?super strong rare earth magnets - once they get stuck?with each other they are difficult & agrave;?separate.?& lt; br / & gt; you should be careful not to break using powerful ones.?open or it may cause damage and cracks in the magnetic material.?& lt; br / & gt; shape: disc & lt; br / & gt; grade: n52 & lt; br / & gt; magnetic force: 4000gauss, 4 kg & lt; br / & gt; & # 8203;?plating: ni cu ni (nickel) & lt; br / & gt; max temperature (degree): 80 & lt; br / & gt; ndfeb material: & lt; br / & gt; color: silver & lt; br / & gt ; diameter of magnetic face: 20 mm & lt; br / & gt; & Eacute; thickness: 10 mm & lt; br / & gt; quantity: 1 pc & lt; br / & gt; demands & lt; br / & gt; acoustic field: the president, receiver, microphone, alarm, audio, audio and therefore on the car.?& lt; br / & gt; electronics: permanent magnetic actuation empty of circuit breakers, magnetic relay, meter, meter, sound meter, reed switch, sensors.?Electrical field: vcm, cd / dvd - rom servo - motors, generators, motors, vibrations, micro - motors, motors, motors.?& lt; br / & gt; machinery and equipment: magnetic separation, magnetic skull, magnetic machinery.?& lt; br / & gt; health care: mr scanners, medical equipment, health products;?magnetic and so on.?& lt; br / & gt; other industries: magnetis & eacute;?of wax, magnetic scale holder, pipes, automatic mahjong machines, magnetic locks, doors and windows magnetic magnetic magnetic luggage, leather magnetic toys, tools , donations and packaging.?& lt; br / & gt; tip: & lt; br / & gt; 1, strong magnets should keep away from iron items and some easily magnetized iron products, such as bank cards, monitors, computers , televisions, mobile telephones and others & lt; br / & gt; 2, strong magnets should be stored in a dry, heated environment.?and need to use wood, cardboard, plastic, foam separated and packaged.?& lt; br / & gt; water meters could affect 3, electric meter, meter & agrave;?gas and bitmeters exist some inaccurate on (such as: if magnets placed near the device, the meter gently) & lt; br / & gt; note: fragile attention and video part, placed ; s in a dry place stored?& agrave;?the temperature of the room.?Warning: it really is a strong magnet and it is totally unsuitable.?for kids.!!?& lt; br / & gt; kit included: & lt; br / & gt; 1 x magnetic strong magnet & lt; br / & gt;?& lt; br / & gt; If there would be a customs clearance fee??pay on your order, it had to be paid.?by you, please understand it.