FlyCube. Antique stonewash finish. Outer Cube: 0.79Ó x 0.79Ó. Inner Cube: 0.475Ó x 0.475Ó. A traditional machinist s exercise, requiring precision and patience, results in a freely moving cube within a cube. A circular hole in each outer face allows you to move the inner cube easily with your fingertips. *Please note: Due to the nature of brass, the FlyCube will develop a beautiful, natural patina with time. Brass construction. Bulk packed.