... ,nanodots,buckyballs,magnet balls 2)Nickel,silver,gold,black,red,blue,green etc 3)4mm,5mm,6mm,7mm SGS/CE/CPSIA 4 ... .05mm) Coating Nickel-Copper-Nickel (NiCuNi) coating with silver,gold, black nickel and shinning nickelMagnetic power(N35grade):5mm 5000-5400guass,6mm ... Jewelry3. Use them on the Refrigerator, White Boards, or make desk art and impress your coworkers.4. The possibilities are endless ...