... , N33AH), working temperature:220 degree Celsius.2.3.Magnet shape: Block,Ring, Arc,Disc, Cylinder, Rod,Bar, Cube,Sphere,Strip etc ... areas,such as:all kinds of electromotors, separators, audio systems, wind turbine, sensors,medical equipment,toys,computers, elevators, cellphones, VCDs and ... the most that we can do for you. NdFeB strong block magnet