Size:D-D-H(mm) Coating:Zn.Ni.Nicuni,Gold,Ag,Epoxy.Passivation.. Magnetization: Yes or No High and stable ... Zn, Ag, Au and other special platings and coatingsShape: arc, tile, square, cylinder and magnetic ring with various sizesHigh magnetic performance ... actuators, microphone assembliesMagnetic separators, automatic mahjong machinesToys and other industries and etc.If you are interested in this motor ...