... Big 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 complex shape;2)Regular shape ... Widely used in industrial automation, mine, motor, communication, petroleum, magnet separator, medical treatment, Hifi acoustics, computer, Aviation, testing ...