Neodymium Cylinder Magnet Neodymium cylinder magnets are also known as neodymium rod magnets. They have straight parallel sides and a circular cross section, and are measured according to the Diameter (D) x Height (H). Neodymium magnets are permanent magnets, and part of the rare-earth magnet family. Neodymium cylinder magnets have the highest magnetic properties and are the most powerful commercially available magnets today. Because of their magnetic strength, neodymium cylinder magnets are the preferred choice for many consumer, commercial and technical applications. https://www.cnzkmag.com/product/neodymium-magnet/neodymium-cylinder-magnet.html