Neodymium Iron Boron (NdFeB) magnets, the most powerful permanent magnets available today, possess high energy up to 52MGOe and wonderful coercive force.1. Primary Material: Neodymium, iron, boron, rare-earth material2. Maximum working temperature: 80-220 degree celcius3. Density: 7.5 to 7.6g/CMM³4. Application: Motors, Windmill, Acoustics, Magnetic separators, Auto, VCM, MRI, Mobile accessories5. Grade available:N35-N52, N33M-N50M, N30H-N48H, N30SH-N45SH, N28UH-N40UH, N328EH-N35EH, N30AH-N33AH