- D1001N52Dimension: 5/16" dia. x 1/32"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.35D1002N52Dimension: 5/16" dia. x 1/16"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.44D1004N52Dimension: 5/16" dia. x 1/8"Material: Sintered Neodymium MagnetGrade: N52Coating: NiCuNi(Nickel)$0.61