Neodymium Magnets.  Neodymium (Rare Earth) Magnets are generally considered to be the strongest permanent magnets available in the consumer market. They offer a high resistance to demagnetization, high Gauss values (unit of magnetic flux density) for size and can be manufactured as Disc’s, Blocks, Rings or in Custom shapes.                                                                                     Please ask or email if additional sizes or pull force is required.                                                         MAG-NEODMRG301: Neodymium Ring Magnet Ø20mm x 10mm x 5mm N38.                          Pull force 5.92 kgs