YM1269L Features Made of rare earth， Neodymium iron boron Adopts three-layer plating Sphere diameter: 3 mm Contains of 216 pcs Up to 5000Gs magnet performance Magnets can be shaped and designed in unlimited ways Great for training your imagination and creativity Also functions as necklace， bracelet or other accessories General Specs Type Buckyballs Material Rare earth， Neodymium iron boron Sphere Diameter 3 mm Quantity 216 pcs Package Details Weight: 23.54 g Size: 12*6*0.5 cm