You are looking at a round magnet made of samarium cobalt, diameter 14mm, thickness 10mm, thickness magnetized, no need for plating (good corrosion resistance), nickel plating is also available, you can choose SmCo5 or Sm2Co17 according to the temperature, corrosion resistance, and cost, radial magnetization is also available if needed.
If you need to customize samarium cobalt magnets you can take a look at this article: SmCo Magnets Custom These are the knowledge you need to know
14mm diameter permanent magnet with higher temperature resistance;