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Bases included. Each cube weighs in at 1kg! Tungsten alloy and aluminum cube set. A beautiful and stunning display of density differences, and the set serves as a great conversation piece. Includes certificate of chemical composition and interesting facts. Machined from aerospace grade tungsten & precision alloy infused aluminum, this cube set is an excellent contemporary addition for your desk at work or side table at home. Surprise your colleagues and friends with the cubes' weight and size. Tungsten is one of the densest naturally occurring elements, and now you can add one of nature's wonders to your own collection. If you like the cube, don't forget to check out our Tungsten Sphere.