... . Magnetic properties: Sintered NdFeB magnet is one of the high performance rare earth permanent magnets, which use neodymium (Nd), iron (Fe), and ... up to 240°C or says 489.6F3. Grade:N33-N52, 33M-48M, 33H-48H, 30SH-45SH, 30UH-40UH, 28EH-38EH ... , 28AH-35AH4. Shape: Disc(Cylinder), Block, Ring, Countersunk, Segment and more, trapezoid, irregular shape, customized shapes ...