- D0401N52Dimension: 1/8" dia. x 1/32"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.12D0402N52Dimension: 1/8" dia. x 1/16"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.16C0404N52Dimension: 1/8" dia. x 1/8"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.16