YM0772S Materials: Rare earth， Neodymium iron boron and gold Process: Three-layer plating Sphere diameter: 5 mm Contains 64 magnetic spheres Up to 5000Gs of magnetic force Magnets can be shaped and designed in unlimited ways Great for training your imagination and creativity Also functions as a necklace， bracelet or other accessory Package Details Weight: 34.24 g Size: 2*2*2 cm Package Includes * 5mm Buckyballs Neocube Magnet Toy 64pc Set