... meet:ISO9001:2000 , CTI Test magnetic NdFeB disk Magnet(NdFeB magnet) is made from Neodymium,Iron, ... Gold, and etc.Sizes: according to your requirementsShapes: disc, cylinder, sphere, block ,ring ,tile, arc, and ... to 200 degrees C Products technologhy: Applications:NdFeB Magnet are widely used in computers(voice coil ... motor of hard disc drive, pick-up of optical disk drive), ...