Product Name: Strong Magnetic Sheet Plate Magnets Cheap Neodymium Magnets Model NO.: GME-Block Grade: N48 Coating: Nickel Shape: Block Application: Electronic Products, Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet, Generator Magnet Product Name: Strong Magnetic Sheet Plate Magnets Cheap Neodymiu Envrionment Management System: ISO9001/14001 Certificate: Ce/RoHS/SGS Tolerance: +/- 0.05mm Model Number: N48 Magnetization Direction: Axial/Radial/Multi-Poles Magnetization Working Temp.: 80-200 Degree Centigrade Transportation: by Sea, by Air, by Express Payment: T/T, Paypal, Western Union Lead Time: 15-25days Trademark: GME Transport Package: Carton, Wood Case, Anti-Magnetized Package Specification: F20x10X2mm Origin: Ningbo/Xiamen HS Code: 850511100 Product Description A 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.