... .Magnet M-(N33M-----N50M), working temperature:100 degree Celsius.Magnet H-(N33H------N48H), working temperature:120 degree Celsius.Magnet SH-(N30SH ... , N33AH), working temperature:220 degree Celsius.2.3.Magnet shape: Block,Ring, Arc,Disc, Cylinder, Rod,Bar, Cube,Sphere,Strip etc ... the most that we can do for you. NdFeB strong block magnet