... , N33AH), working temperature:220 degree Celsius.2.3.Magnet shape: Block,Ring, Arc,Disc, Cylinder, Rod,Bar, Cube,Sphere,Strip etc ... Magnet is your reliable partner.5.Tolerance:6. Magnetic properties: Super strong magnetic force and intrinsic coercive force. Good in ambient temperature ... the most that we can do for you. NdFeB strong block magnet