YM0769B Material: Rare earth， neodymium iron boron and gold 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 Great for training your imagination and creativity Can function as an accessory such as a necklace or bracelet Package Details Weight: 64.20 g Size: 3*3*3 cm Package Includes *5mm Buckyballs Neocube Magnet Toy 125 pc Set