The CUBE is the result of a collaboration between Karas Kustoms and Dudek Modern Goods. Each CUBE is machined from a solid block of Brass and features black Delrin inserts, rubber feet, custom surface finishing, and high-quality engraving. The custom-machined inserts are pressed into the body of the CUBE and have a bore of 9/16? to accommodate most pens. The rubber feet keep the CUBE from sliding around and slightly elevate it from the surface it rests on, giving it the illusion of weightlessness. When, in fact the brass CUBE weighs 5 lbs, 10oz. This insures that your pens will be safe from being accidentally knocked over, or rolling off a desk. Each pen is separated and will not knock into each other, causing unwanted damage. Plus, you can safely display your pen collection in a unique and organized fashion.