- B040404N52Dimension: 1/8" x 1/8" x 1/8"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.14B040408N52Dimension: 1/8" x 1/8" x 1/4"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.23B040412N52Dimension: 1/8" x 1/8" x 3/8"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.33