... best price 3.Short lead time and all-round disc speaker magnet Magnet(NdFeB magnet) is made from Neodymium,Iron,Boron ... -Ni, Zn, white-blue Zn, Expoy, Gold, and etc. 3.) Sizes: according to your requirments 4.) Shapes: disc,cylinder,sphere,block ... the Neodymium magnets(Ndfeb Magnet)1.) Electro-Acoustic Field: Receiver, Speaker, Microphone, Audio alarm stage, Loudspeaker2.) Motor Field: Voice coil motor ...