PRODUCT SPECIFICATIONS: Cubes have laser marking information, including: Atomic Number, Chemical Symbol, Name, Density, Purity, Nuclear HIGH PURITY: 99.99% purity elemental simple substance. Perfect for Elements Series, Lover, DIY, Experiment, Material Display PRECISION ENGINEERING: The cubes are non- and safe for all ages. They are manufactured with leading- to produce crisp edges and flat facets with the lowest market tolerance (+/-0.1)mm. BEAUTIFUL APPEARANCE: metal cubes are precisely cut and engraved on the surface with a nice engraving process, which are convenient to know; We use vacuum packaging to reduce the occurrence of metal oxidation; And it is equipped with a transparent box to protect the product from oxidation. MEANINGFUL GIFT: metal elements cubes are appropriate for classrooms, offices, science sections, homes and schools, and are suitable for all ages, better understanding of metals and elements, and a real feel for different densities About Cubes: Color: elements color. Some with polished surfaces and some others with anodyzing colors Surface: With double face laser engraved information: elements symbol, name and density on one face, purity and atomic weight on the contrary face. Collection can be attractive and addictive. Periodic table elements collection is just like so. Therefore, always see, or small, a periodic table with real elements displayed in some institutes or universities or some famouse people. It's always a great topic there. The provides a wide range of educational applications suitable for all levels of courses, including chemistry, physics, density measurement, specific heat, and gravity research. Suitable for science education projects, including a wide range of activities such as hands-on experiments in engineering, aviation, robotics, , chemistry, physics, biology, and geology. size: 10mm/0.39Inch Material: Metal colour: silver Package Contents: 1 x Tin Cube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.