FlyCube. Antique stonewash finish. Outer Cube: 0.79” x 0.79”. Inner Cube: 0.475” x 0.475”. A traditional machinistês 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 copper, the FlyCube will develop a beautiful, natural patina with time. Copper construction. Bulk packed.