... reasonable price 4)Certification:ISO9001 Product DescriptionMaterial Grade of NdFeB magnet: Magnet N-( N35, N38, N40, N42, N45, N48, ... 30SH, 33SH, 35SH, 38SH, 40SH, 42SH), Magnet UH-( 28UH, 30UH, 33UH, 35UH, 38UH), Magnet EH-(28EH, 30EH, 30EH, 33EH, 35EH) ... sizes Application: various generator and motor with high-torque and speed, and for holding, speaker and sensor. GradeBrHcbHcj(BH)maxDensityWorking ...