Sens Magnetic Products, Inc,(SensMag, Inc) can make micro magnets in Alnico, NdFeB, SmCo , Ceramic CeCoCuFe and other materials with very tight tolerances, the shape can be made as ring,rod,disc,block and others. Also, we can supply high quality parylene coating or gold-plated on micro NdFeB magnet. This will help customer solve some problem on rust or welding.                                                                 http://www.sensmagnetics.com/