... counterbored/countersunk ring NdFeB magnet Ring NdFeB magnet1.Material of NdFeB magnet:Magnet N-( N30-------N52), working temperature ... in many industrial areas,such as:all kinds of electromotors, separators, audio systems, wind turbine, sensors,medical equipment,toys,computers ... . Environment and recycle friendly Meet the environment standard of RoHS issued by EU. Electroplating uses chemical-plating ...