YM0855X Material: Rare earth， neodymium iron boron Process: Three-layer plating Sphere diameter: 5.0 mm Contains 216 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 fashion accessory such as a necklace or bracelet Color: Dark blue， red， green and purple Package Details Weight: 107.00 g Size: 5*5*3 cm