... 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 ... : N33,N35,N38,N40,N42,N45,30M,33M,35M,38M,40M,30H ... standard of ROHS.Mainly made from neodymium, iron and boron and other ... industrial automation, mine, motor, communication, petroleum, magnet separator, medical treatment, Hifi acoustics, computer, ...