... many grades:N35-N52, 33M-45M,30H-45H etc. Annular NdFeB magnet Shape: Arc(segment),Block,Cube,Cylinder,Disc,Ring,Rod ... is 220 degree.Coating:Zn,Ni,NiCuNi, Au,Passivation Application: NdFeB magnets are generally used for motors, speaker, toys and electronics ... kinds of motors. We are professional manufacture on magnet for 10 years. Also we produce according to customer's design and ...