- D2401N52Dimension: 3/4" dia. x 1/32"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$1.21D2402N52Dimension: 3/4" dia. x 1/16"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$1.73D2404N52Dimension: 3/4" dia. x 1/8"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$2.43