Rare earth neodymium magnets made by Applied Magnets are composed of top quality Neodymium, Iron, Boron raw materials, they have excellent magnetic property and extremely strong for its small size. rare earth neodymium magnets are the strongest types of permanent magnets. They have highest maximum energy product among all permanent magnets. The corrosion resistant nickel copper nickel triple layer coating provides smooth and shiny silver finish. ISO Certified, top notch quality guaranteed. Made of commercial grade, highest quality rare earth material. These magnets are very powerful, make sure you read safety warning before purchase. Our magnets are designed and manufactured to meet or exceed the highest quality standard, applications include fasteners, magnetic water treatment, wind generators therapy, speakers, motors, loudspeakers, hard disk drives, jewelry, science experiments, art, craft and much more.