Nanodots are magnet spheres precision-milled from sintered Neodynium-Iron-Boron.Measuring 5mm in diameter, Nanodots are designed to model atomic interactions at a human scale.StrengthMade out of the strongest permanent magnets known to man. Able to lift 1,000 times their own weight and last over 20,000 years.ConsistencyMilled to exacting dimensions suited for complex creationsSurfaceEngineered to withstand repeated impact and resist corrosion. The coatings are antibacterial and washable.MaterialsA synergy of Earth metals with their own unique properties.Includes: 64 Nanodots Magnetic Constructors.Age: 14+*This product is not suitable for children.Warning!This Product contains small magnets. Swallowed magnets can stick together across intestines causing serious or fatal injury. Seek immediate attention if magnets are swallowed or inhaled.