Magdev ring magnets neodymium iron boron n35h packs of 5 magdev rgni05928n a sintered neodymium iron boron magnet manufactured from n35h grade material ndfeb magnets give the highest energy per unit volume of any permanent magnet material being able to lift up to 100 times its own weight applications for neodymium magnets are wide ranging and are used extensively within many industries including aerospace automotive medical and renewable energy magdev rgni05928n neodymium iron boron n