1. The difference in magnetic force: the single-sided du magnet of the same specification has lower magnetic force than the double-sided magnet.

2. The difference in wrapping: The single-sided magnet is composed of a dao iron shell assembled with a magnet, so that the magnetism of the wrapped side will be shielded, the magnetic force will be refracted to the other side, and the magnetism of the other side will be enhanced. The double-sided magnet is an ordinary wafer magnet, and it is not wrapped.

3. Application difference: single-sided applications such as nuclear magnetic resonance imaging, mobile phone vibration, hard disk drive voice coils, power tools, inverter air conditioners; double-sided applications such as audio devices, magnetic adsorption devices, magnetic separators, magnetizers.

Factors affecting the magnetic effect of the magnet:

1. Material: The choice of material and its thickness are closely related to the distance between the magnet and the material.

2. Angle: According to the principle of refraction, the arc-shaped material has an excellent effect, and the right-angled material has a large refraction loss.

3. Space: The lines of magnetic force in the air are like mobile phone signals and need space to be reflected. If the flashlight pot is completely wrapped on the bulb, the use effect is definitely not good, because a lot of light refraction is lost.