Our neodymium sphere magnets are made of strongest magnetic material sintered NdFeB. They are grinded to one sphere from one cube magnet, like 5.3X5.3X5.3mm. Each ball magnet will be coated with Nickel,silver,gold,or chrome,so that it shows different color and good capacity of corrosion resistance.

The 5mm sphere magnet is very hot around the world, we build 216 sphere magnets to one cube of 6X6X6, that is what we call "Neo cube". Many consumers are crazy with them as they can use these sphere magnets to build unlimited shapes and structures. The N35 material provide enough power to hold together but you can also play  and seperate them with your gentle hands.