... 2.Very stable. 3.Strong resistance to demagnetization Sintered NdFeb cup Magnet*********************************** Products performance:Grade: N35-N52,30H-48H ... : Block, Tile, Disc, Ring, Segment, Cylinder, etc.*********************************** Products detailed: Material Grade of NdFeB magnet:GradeBr mT(KG)bHc ... speakers, linear actuators, household appliances, toys, bags.... sintered ndfeb magnet