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Introducing our NEW Tungsten and Magnesium cube sets! The most shocking display of density yet! Our magnesium cube is made from an incredibly light magnesium alloy (density of 1.77 g/cc), while our tungsten cube is as heavy as it gets (density of 18 g/cc). At equally sized pieces, tungsten is over 10x the weight of magnesium! Our 2" cube set consists of one 2" x 2" x 2" magnesium alloy cube and one 2" x 2" x 2" tungsten alloy cube. Our 2" magnesium cube weighs 0.51 lbs and our 2" tungsten cube weighs 5.2 lbs or 2.36 kg.