15-Piece Cube Set: Includes 10mm metal cubes made from Tungsten, Titanium, Bismuth, Carbon, Aluminum, Iron, Magnesium, Copper, Zinc, Chromium, Nickel, Tin, Antimony, Zirconium, and Molybdenum. Precision Engineering: 10mm cubes are non-toxic and safe for all ages. Manufactured with advanced technology to ensure crisp edges and flat surfaces with a tolerance of 0.1 mm. Laboratory Grade Purity: Metal cubes have purity levels ranging from 99.5% to 99.99%. Vacuum packed to maintain appearance and prevent oxidation. Laser Engraved: Each cube is engraved with the chemical symbol, element name, atomic number, density, purity, mass, and melting point. Unique Variety: Features several rare metals. Density range from 1.73 g/cm (magnesium) to 19.25 g/cm (tungsten). Includes carrying case and periodic table booklet. Color: As shown Material: Metal Package Contents: 1 set x metal cubes (15 pieces) Note: Light reflection and display differences may cause slight variation in color. Measurement error allowed is 13 cm.