... ring,disc,block etc High level and powerful Steady qualtity for speaker Speaker Magnets/neodymium speaker magnet/Neodymium Iron ... providing powerful Neodymium speaker magnets with the shape of ring, disc, block, cylinder, block and segment.Features ... , and magnetic jewelry. We also supply ferrite cores, MnZn cores and NiZn cores for transformers and coils, loudspeaker magnets, motor magnets ...