... -N50M,etc. 4.Coating:NiCuNi,Zn,etc. neodymium disc magnet Product Image Descriptionneodymium disc magnet1.Material:rare earth ,Neodymium - ... Iron-Boron2.Shape:Tile,Ring,Disc,Round,Block,Cylinder,Tile,Arc,customers3.Size:4X3mm,5X3mm,8X3mm,30X5mm, ... high Hc and Hci output c) More economical than SmCo d) Wonderful performance at ambient temperature TransportationAll available shipping ...