... Neodymium Magnetic disc Coated: Ni Zn Gold and so on Shape: According to your needs NdFeB(Neodymium) Magnet disc1)Suitable for marking small volume magnet with ... the environment standard of ROHS.Mainly made from neodymium, iron and boron and other mental element ... in industrial automation, mine, motor, communication, petroleum, magnet separator, medical treatment, Hifi acoustics, computer, Aviation, ...