... .Many coatings with many colors magnetic disc magnet Product Image Description1.Material:rare earth ,neodymium -Iron-Boron2.Shape:Block ,Ring,Disk,Round ... -N52,N30M-N50M,N30H-N48H,N30SH-N45SH,N28UH-H40UH,N28EH,N38EH.4.Coating : Ni,Zn,Gold,Silver,Epoxy,chemical plating Ni ...