... Boron 2.Shape: Disc,Disk,Stick,etc... 3.Certificate: TS1 NdFeB Disc Magnet:- N35-N52, N48M, N48H, N45SH, N38UH, ... - Dimension range: 1-280 mm- Guaranteed qualityProduct specifications:1. NdFeB Permanent Magnets with different grades of: N35, N38, N40, ... high intrinsic coercive force.6. With precise tolerance.Application for NdFeB magnet:Magnetic separator, Sensors, Wind generators, Vibration motors, ...