Neodymium magnets are the strongest permanent magnets people made. It majorly contains 3 elements, i.e. Nd, Fe, B. So it's also called NdFeB magnets.

The magnet in this list is made of grade N45 neodymium magnetic material. The magnet is coated with triple layers, Ni+Cu+Ni, which is the best coating available. The tolerance of all the dimensions are +/-0.0002".

The magnetic characteristics of the magnet,
Grade: NdFeB, Grade N45
Gauss: 13,800
Pulling Force: 58 lbs
Polarity: Through 3/8" thickness
Plating: Nickel-Copper-Nickel triple-layer, the best available

About this Neodymium Magnet: This neodymium permanent magnet can be used for wind generators for about 300-500 W. The neodymium magnets are used for generator more common than ceramic magnet today since it's 7-8 times stronger. This kind of magnet is also known as NdFeB magnets, or neo rare earth magnets. Since it's very strong, people also simply call it super strong magnets or super powerful magnets. The major elements of this magnet include neodymium (Nd), iron (Fe) and boron (B), or NdFeB.