... 3. SGS certified 4.Fast Shipping MaterialNdFeb MagnetShapeBallDiameter4.8mm,5mm,6mm,7mm,8mmColorNickel, Black,Silver, GoldQuantity216 PCS/SETTolerance+/-0 ... Magnetic spheres , Neocube magnet , Magnetic balls Features: We also can produce other size like 4.8mm,5mm,6mm, 7mm and 8mm ... N35/N38/N40 grade, Use standard N35 grade neodymium magnet,the magnet force more than 5000guass2) Colors: Ni-Cu-Ni (Nickel ...