ndfeb magnet N42SH grade Disc shape,spec.24.2X3, Ni coating Surface Treatment practicable: ZN,Ni,Tin,Gold,Epoxy,Parylene,Plastic packed, Telphlone Dimension RangeDia(1-180)mm Thickness(0.5-40)mm Grade Available:full grade Rare earth disc magnet for sensorndfeb magnet