Marked InformationEach metal density cube measures 1 inch/25.4 (+/-0.1)mm. They have laser-marked information on the surface, Atomic Number: 29, Chemical Name: Copper, Atomic Mass: 63.546, Purity: 99.95, Density: 8.96g/cc, Boiling Temperature: 1984℉, Weight: 164g.High DensityThe zero-tolerance cube is made of a purity element simple substance, been through cutting and polishing, the polishing process completely removes cutting marks, and natural metal (element) color with matt surfaces, great for element collections, hobbies, DIY,s, and material display.Safety MaterialMagnesium metal blocks are made of high-density iron element cube, are safe for all ages, They are practical educational applications for different grade levels and also are great for element collections and display.
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