This is a customized 45mm ring magnet for Turkish customers, medium size, the material is neodymium, outer diameter of 45mm, center hole 35mm, thickness 2mm, the surface of the nickel-copper-nickel plating treatment, can be very good protection of the magnet itself, such as your needs, you can also be plated with epoxy, zinc, black nickel and other plating, we are a manufacturer of permanent magnets, so you do not have to worry about the price is expensive or do not have your specifications.
Larger size ring magnets are recommended;