2.5" x 2.5" x 2.5" Mg Cube, One Kilogram Lightweight Mg alloy density: 1.77 g/cc Edges rounded for safe handling Great for desks or shelves at home or at work Perfect compliment to our 1.5" tungsten kilo cube (density 18 g/cc). AVAILABLE TOGETHER AS A KILO CUBE SET! NEW Magnesium Cubes! After many years of customer requests, magnesium cubes are finally here! This cube is 2.5" x 2.5" x 2.5" and weighs 1.0 lbs. These cubes have a beautiful brushed finish, which highlights the silvery-white luster of this unique element. It is incredibly light alloy (density of 1.77 g/cc), especially when compared to our dense tungsten cubes (density of 18 g/cc). If you love this product, you should check out our tungsten and magnesium cube sets! A 1.5" tungsten cube is a staggering 2.2 lbs, while a 1.5" magnesium cube is 0.2 lbs.