Nickel metal granules: 1 grain about 7-8g, size 6-12mm. Electrolytic nickel beads, electroplating nickel beads materials, pure nickel 99.98%. Specification: diameter 2-50mm, length 100mm (if you need other diameter or length, please us) Nickel is a chemical element, chemical symbol Ni, atomic number 28, relative atomic mass 58.69, it belongs to subgroup VIII and the fourth period element, also belongs to the transition metal element. Nickel has a density of 8.902 g/cm ³, a melting point of 1453 C and a boiling point of 2732 C. It is a silver-white, hard, ductile and ferromagnetic metal that is often used to make magnetic alloys and shape memory alloys.