... NdFeB magnet) is made from Neodymium,Iron,Boron and some other transitive metallic elements to make it strong. General features:Grades:N33 ... : disc, cylinder, sphere, block ,ring ,tile, arc, and etc.High magnetic performance (Br: 11,000 to 14 ... mobile phones, wind generator, magnetic resonance image, Hi-Fi system, auto motors, etc. Certifications:ISO9001:2000SGSCTI NdFeB Magnetic disk