... grades:N35-N52, 33M-45M,30H-45H etc. Annular NdFeB magnet Shape: Arc(segment),Block,Cube,Cylinder,Disc,Ring,Rod,SphereMaterial ... grade of sintered magnet: Magnet N-(N35~N50),working temperature is 80 degree. Magnet M-(33M~45M),working temperature is ... /VCD, all kinds of motors. We are professional manufacture on magnet for 10 years. Also we produce according to customer's ...