... magnet is much stronger than alnico magnet, ferrite magnet, .has high BH value, but easy to be rusty, so we usually ... ring magnet ,which can be be used in medicine ,machine ,motors ,pakaging box and so on.If you are interested in our ... magnets, please tell us the grade, size, magnetization direction, coating and other requirements. Sintered ring NdFeB magnets used in machine,medicine and etc.