... 2).High temperature stability 3).Certificate:ISO9001:2000 Neo Magnet Disc A. SpecificationMaterial: Sintered Neodymium-Iron-Boron;Grade:N35-N52,35M ... ,33SH-45SH,30UH-40UH and 30EH-38EH;Shape: ring,block,disc,segment,strip and so on;Size: as your requirement, large ...