Permanent Magnets

Tengye is a leading permanent magnets factory in China, providing types of permanent magnet. Permanent magnets are materials that can maintain a magnetic field without an external source of energy. They are made up of ferromagnetic or ferrimagnetic materials, such as iron, nickel, and cobalt, along with some rare earth metals like neodymium and samarium.
https://www.tymagnetics.com/products/permanent-magnets/