Materials: Neodymium-Iron-Boron shape: Block certificate: ISO9001: 2008 sigh, if the world were a giant magnet````wait, it is!! 40*20*5mm Strong Block 2 Countersunk Holes 5mm Rare Earth Neodymium Magnet CS-L-042 ◊key specifications of rare earth arc magnet MaterialSintered Neodymium-Iron-Boron;GradeN33-N52,33M-48M,33H-48H,30SH-45SH,30UH-38UH and 30EH-35EHShapering,block,disc,bar and so ...