216 PCS3mm Magic Iron Puzzle Cube Magnetic Balls Puzzle Magnet Block Desk Hunting AmmoIntelligence develop and Stress ReliefStress BallDimensions: 3.00MM diameter Tolerances: ±0.002″ x ±0.002″ (+/-0.05mm x ±0.05mm)Material: NdFeB, Grade N42Plating/Coating: Ni-Cu-Ni (nickel) triple plated, Or Zn (Zinc) platedMagnetization Direction: Axially Magnetized (Poles at 2 points, 180° opposite one another)Max Operating Temp: 176ºF (80ºC)Compact design and smooth feeling with magnetic ballsUltra strong 216Pcs magnetic balls with 3mm diameterMore than just a toy, you may use these balls to make jewelry or fun creationsCapable of forming billions of models such as flowers, leaves, ball, pyramid, etc.Build anything which you can imagine, like 2-D or 3-D objectsCreate and recreate an outrageous number of shapes and patterns with these 216 ballsActivate your imagination and creativityGreat for releasing stress or pressure from daily life and improve your hand flexibilityPerfect for testing your mental skills and challenging your patienceProvide you with hours and hours of fun & entertainmentPlay these magnetic spheres with your friends and enjoy the happinessPerfect intelligence gift for you and for your friends.Note: Keep out of reach from children, recommended age 8