What you will receive: 14 15mm elemental Squares covering most harmless metal elements in the periodic table, including tungsten, aluminum, copper, titanium, molybdenum, iron, zinc, cobalt, carbon, niobium, bismuth, antimony, vanadium, chromium , suitable for metal collectionSturdy Metal: The metal Square set is made of solid metal, which is reliable and sturdy and not easy to deform or rust.Precision machining: High-quality chemical Elements Squares are precision cut to flatness and dimensional tolerance, very close to the theoretical density, finely processed sharp edges and corners without burrsExquisite appearance: These metal Squares are precisely cut and carved, and the carving workmanship is exquisite for your convenience; please receive the goods and then protect the metalMeaningful Gift: Metal Elements Squares are suitable for classrooms, offices, science departments, homes and schools, suitable for all ages, better understanding of metals and elements, a real feel for different densitiesmaterial: metalColor as shownPackage Contents:1 set sodium metalOnly 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.