YM0725S Materials: Rare earth and Neodymium iron boron Process: Three-layer plating Sphere diameter: 5 mm Contains 125 magnetic spheres Up to 5000Gs of magnetic force Magnets can be shaped and designed in unlimited ways Color will not fade Great for training your imagination and creativity Also functions as a necklace， bracelet or other accessory Package Details Weight: 66.34 g Size: 5*5*3 cm Package Includes * 5mm Buckyballs Neocube Magnet Toy 125pcs Set