... . Features: high magnetic remanence, coercive force and magentic energy products. superior magnetic properties competitive cost performance ratio can ... ,invisible magnetic button and invisible magnet and other uses of magnets Material Grade of NdFeB magnet: Magnet N-( N35, N38, N40 ... , N42, N45, N48, N50,N52), Magnet M-(35M, 38M, 40M ...