1 Pc. N52 Neodymium Magnet (TWENTY) 20MM DIAMETER Variations [ 3mm / 5mm Thickness] Strong Rare Earth Round Coin-Size Round Circle Disc Magnet for BOX & BAG, Leather, Acrylic, Printing, Fridge Refrigerator Magnet for School Science Physics Projects

category of materials known as "rare earths." The name of the rare earths is not due to their concentration in nature but to the difficulty which occurs in the separation of these from other materials with which they are linked through chemical bonds. For this reason, it can be said that the neodymium magnets are not the cheapest but their magnetic force is among the most powerful, this power is found already in a magnet of few centimeters. What you need to do is look for the form most suited to you. We offer the following forms: disks, cones, rings, cylinders, cuboids and blocks, cubes and spheres. Even our self-adhesive magnets are versatile for many uses because they stick practically everywhere.