Super Powerful 20mm Neodymium Rare Earth Magnet Potted Encased M4 Screw mount
Rare-Earth magnet family and have the highest magnetic properties of all permanent magnets, stronger than Samarium Cobalt (SmCo), Alnico and Ferrite. Much stronger than ordinary Ferrite magnets. 20mm Neodymium Rare Earth Potted Magnet.