Description Material NdFeB Shape Disc Size 20×15 mm Tolerance /- 0.1 mm Direction of magnetization Axial Coating Nickel-plated (Ni-Cu-Ni) Magnetization N42 Strength approx. 13 kg (approx. 127 N) Max. working temperature 80°C (possibly lower) Weight 36 g Neodymium magnet N42 Neodymium magnet D20x15 mm N42 Disc Neodymium magnets, like our other super magnets, are made of a special NdFeB alloy, which allows neodymium block magnets to achieve an extreme adhesive force of up to 200 kg. In our shop, you can find blocks with heights ranging from 1 to 25 mm, which makes them very versatile in their use. The blocks have a protective nickel coating, some even have gold plating, making them look very appealing.