Product Name: Powerful Industrial Sintered Earth Aimant NdFeB Neodymium Magnet Model NO.: N52 Grade: N52 Coating: Nickel Shape: Block Application: Speaker Magnet, Industrial Magnet, Solenoid, Motor Magnet, Industrial Neodymium Magnet Product Name of Neodymium Magnet: Sintered Earth Aimant NdFeB Neodym Magnet Envrionment Management System: ISO9001/14001 Certificate of Neodymium Magnet: CE/RoHS/SGS Tolerance of Neodymium Magnet: +/- 0.05mm Model Number of Neodymium Magnet: Gme-N52 Magnetization Direction: Axial/Radial/Multi-Poles Magnetization Working Temp. of Neodymium Magnet: 80-200 Degree Centigrade Transportation of Neodymium Magnet: by Sea, by Air, by Express Payment: T/T, Paypal, Western Union Lead Time of Block Magnet: 7-25days Trademark: GME Transport Package: Carton, Wood Case, Anti-Magnetized Package Specification: as per clinet's demands Origin: Zhejiang Ningbo/ Fujian Xiamen HS Code: 850511100 Product Description Powerful Industrial Sintered Earth Aimant NdFeB Neodymium magnetA permanent magnet is that a magnet that is permanent, in contrast to an electromagnet,which only behaves like a magnet when an electric current is flowing through it.Permanent magnets are made out of substances like magnetite (Fe3O4),the most magnetic naturally occurring mineral or neodymium, Samarium cobalt, a powerfully magnetic synthetic substance.