Neodymium Ball Magnets 15mm

15mm magnetic balls have extra strong pulling force. Unlike 5mm magnetic balls bulk magnets, you can not separate such strong sphere magnets easily if there are no plastic spacers between each other.15mm magnetic balls are usually made of N35 grade, and plated with chromium or nickel. You have to handle strong magnetic balls with care. If two strong magnetic balls collide, the great impact force at the collision point will make the plating layer fall off. Strong magnetic balls are definitely not toys for children! Other grades and electroplating can be customized. (More customization info at: custom neodymium magnets)