Density cube: 10mm,+/-0.05mm. High purity, up to 99.99% (non alloy), suitable for element collection and display. Metal density cube periodic table element plate is used for element collection, laboratory experimental materials, and display of material blocks. Element cubes are ideal for classrooms, offices, public areas, science departments, and home schools. High quality: This set consists of four high-density cubes, including tungsten, aluminum, titanium, and copper, with a long service life. Copper cube 8.9g Cu 99.95%, aluminum cube 2.7g Al 99.99%, titanium 4.57g Ti ≥ 99.5%, tungsten cube 19.16g Wu ≥ 99.95%. Cube contains the information of laser marking, including: number, Chemical symbol, name, density, purity and mass. The element cube is completely handmade without edges. It is very suitable for collection. Each cube is packed in a sealed bag and carried with you, Weight: 0.0992080179 Pounds, Manufacturer: Rfeeuubft