- R640812N45Dimension: 2" od x 1/4" id x 3/8"Material: Sintered Neodymium MagnetGrade: N45Coating: NiCuNi(Nickel)$34.98R641608N45Dimension: 2" od x 1/2" id x 1/4"Material: Sintered Neodymium MagnetGrade: N45Coating: NiCuNi(Nickel)$17.48R641664N45Dimension: 2" od x 1/2" id x 2"Material: Sintered Neodymium MagnetGrade: N45Coating: NiCuNi(Nickel)$243.25R643208N42Dimension: 2" od x 1" id x 1/4"Material: Sintered Neodymium MagnetGrade: N42Coating: NiCuNi(Nickel)$17.48