Product Name: Strong Magnet Rare Earth Permanent Magnetic for Generator Model NO.: NDFEB Grade: N30H-48H Coating: Customized Shape: Block Application: Industrial Magnet, Motor Magnet Tolerance: +/-0.05 Magnetism Direction: Width Plating: Nickel,Nicuni,Zinc,Epoxy,Gold,Sliver,Parylene Express: TNT,DHL Material: NdFeB Magnet Province: Zhejiang Certification: GB/T 19001-2016/ISO 9001:2005 Size: Customized Color: Bright Sliver Trademark: RCMAG Transport Package: as Customer Required Specification: Neodymium Magnet Origin: China HS Code: 85051110 Product Description Strong Magnet Rare Earth Permanent Magnetic for GeneratorProduction Information: Neodymium magnets are a member of the Rare Earth magnet family and are the most powerful permanent magnets in the world. They are also referred to as NdFeB magnets, or NIB, because they are composed mainly of Neodymium (Nd), Iron (Fe) and Boron (B). They are a relatively new invention and have only recently become affordable for everyday use. N35, N38, N42, N38SH...what does it all mean? Neodymium magnets are all graded by the material they are made of. As a very general rule, the higher the grade (the number following the 'N'), the stronger the magnet. The highest grade of neodymium magnet currently available is N52. Any letter following the grade refers to the temperature rating of the magnet. If there are no letters following the grade, then the magnet is standard temperature neodymium. The temperature ratings are standard (no designation) - M - H - SH - UH - EH.Product Display