... : Neodymium-Iron-Boron 2.Shape: Disc,Disk,Stick,etc... 3.Certificate: TS16949 / ISO2008 NdFeB Disc Magnet:- N35-N52, N48M, N48H, ... 1-280 mm- Guaranteed qualityProduct specifications:1. NdFeB Permanent Magnets with different grades of: N35, N38, N40, N42, N45, ... force and high intrinsic coercive force.6. With precise tolerance.Application for NdFeB magnet:Magnetic separator, Sensors, Wind generators, ...