... , N33AH), working temperature:220 degree Celsius.2.3.Magnet shape: Block,Ring, Arc,Disc, Cylinder, Rod,Bar, Cube,Sphere,Strip etc ... force and intrinsic coercive force. Good in ambient temperature. High anti-corrosion and stable performance.7. Technology: Application of new sintered ... the most that we can do for you. NdFeB strong block magnet