... oxidation or rust,and elimination.Users should consider magnet coating,plating or suitable surface treatment.5) Less ... than ceramic,higher than SmCo type rare earth magnet.7) Irreversible loss at high temprature.8) ... Types:N30,N33,N35,N38,N40,N42,N30M,N35M,N38M,N40M,N27H,N30H,N33H ... ,N27SH,N30SH,N33SH,N35SH,N25UH,N28UH,N30UH,N35SH,N38,N45,N48,N50 and N529) High energy ranging ...