BRAND NEW SUPER STRONG N35 DISC MAGNET 20MM DIA X 5MM Neodymium Magnets Neodymium is an element that was discovered in 1885, it was not until the early 1980's that the element was alloyed with iron and boron to create the "Neodymium magnets" which we use today. The name "Rare Earth Magnets" does not refer to their abundance. Neodymium is about as common as tin or lead. The term Rare Earth relates to a specific group of elements in the Periodic Table which lists all known elements in groups according to their similar chemical properties. Neodymium magnets are many times more powerful than the better known Ferrite magnets. The magnetic strength of a Neodymium magnet is measured by it's "N" number; the higher the number the more powerful the magnet. N numbers range from N27 - N52
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