When magnets are used in some special environments, special coatings are needed to better protect them, such as epoxy. This sample is a cylindrical black magnet with a diameter of 4mm and a height of 10mm. The appearance looks black because the surface coating is black epoxy resin, weighing about 0.96g, with radial magnetization and strong magnetic surface on the side of the magnet. It can be used in toys, sensors, electronic products, electrical appliances, etc.
If you need axial magnetization, other coatings, high-precision tolerances are no problem, to consult!
Other size 4mm rod magnets;