... forms, structures, stress relief more 1) Introduction of Magnetic Sphere, Neocube toy, Magnetic ball: Each set contains 216 powerful Rare Earth magnets ... useless. 2) Tolerance of Neocube toy (Magnetic sphere, Buckyball): <=0.02mm3) Coating of Neocube toy (Magnetic ball, Neocube): Ni, black Ni, Silver, ... in 10 days 216pcs/set, 5mm size, Neocube toy, Magnetic ball, Good gift and present, Amazing Neocube