... 1-280 mm- Guaranteed qualityProduct specifications:1. NdFeB Permanent Magnets with different grades of: N35, N38, N40, N42, N45, N48, N50, ... N52(M, H, SH, UH, EH) etc.2. Working temperature for NdFeB Permanent ... high intrinsic coercive force.6. With precise tolerance.Application for NdFeB magnet:Magnetic separator, Sensors, Wind generators, Vibration motors, DC motors ...