Block magnet high Br, Hcj & (BH)max, Block & any size, N30-N45, 33M-45M, 30H-42H, 30SH-40SH, 28UH-35UH, 28EH-33EH. Block magnetAt ... available fields since the mid 1980's. makes it suitable for servo motors, disk brushless motors, stepping motors, IT industry, ... MRI, and audio products. For NdFeB, NdFeB Magents are prone to corrosion in humid environments ...