Large ring magnets 1)Material:sintered NdFeB magnet 2)Garde:N35-N38-N40-N42-N45-N48-N50-N52 3)Nickel,Zn etc coating Large ring magnets1)Raw materail:Sintered Neodymium-Iron-Boron (NdFeB)2)Garde:N35-N52,N35M-N48M,N35H-N45H,N33SH-N42SH,N30UH-N40UH,N30EH-N35EH.3)Shape:Disc,block,cylinder,ring,bar,sphere,tile etc.size according to customer’s request.5)Coating:Ni,NiCuNi,Zn,Black Expoxy,Black Nickel,Ag ...