... ,Parylene,Plastic packed, Telphlone Full grade NdFeb Magnet, Magnetic material, Neodymium MagnetRing Magnetic Neodymium (NdFeB)magnets in ring shape.Neo NdFeB mangets ... .high maxium magnetic energy.high intrinsic coercive force.Ni Coated to protect the surface..Application for PM motor,speakers,magnetic separator and other ...