- R200404N45Dimension: 5/8" od x 1/8" id x 1/8"Material: Sintered Neodymium MagnetGrade: N45Coating: NiCuNi(Nickel)$1.38R200408N45Dimension: 5/8" od x 1/8" id x 1/4"Material: Sintered Neodymium MagnetGrade: N45Coating: NiCuNi(Nickel)$2.61R200420N45Dimension: 5/8" od x 1/8" id x 5/8"Material: Sintered Neodymium MagnetGrade: N45Coating: NiCuNi(Nickel)$6.98