1)Neocube,nanodots,buckyballs,magnet balls 2)Nickel,silver,gold,black,red,blue,green etc 3)4mm,5mm,6mm,7mm SGS/CE/CPSIA 4)N35

neocube,magnet cube,magcube,magnet balls,magnet sphere,buckyball,nanodots is a DIY toy Neodymium Iron Boron (NdFeB) Magnet spheres make a fun puzzle. These 216 rare earth magnet spheres will provide you hours of enjoyment. Simple yet addictive, these magnets can also be used for thousands of other helpful tasks around the house. Please keep away from younger children and pets.

Main specs of our neocube:Grade: NdFeB rare earth material N35

Diameter: 4.8mm,5mm,6mm,7mm,8mm(tolerance+/-0.05mm)

Coating Nickel-Copper-Nickel (NiCuNi) coating with silver,gold, black nickel and shinning nickel

Magnetic power(N35grade):5mm 5000-5400guass,6mm 5400-5800guass,7mm 5800-6200guass

Certification approved: SGS (ROHS)/CE CPSIA/H.R.4040 certificaiton 

Package:plastic bag/plastic box/sack bag/round or cube metal gift box/vacuum package/cardboard box or OEM as your package designThe incredible Enigma are also great for:1. Science Experiment2. DIY making Jewelry3. Use them on the Refrigerator, White Boards, or make desk art and impress your coworkers.4. The possibilities are endless.We are providing very high quality magnets and offering very competitive price in the market as we are original manufacturer. It is proved as we are also providing our products to many resellers