Shengshou 4x4x4 Puzzle Cube Black Go to amazon.com Related posts 6 best 4x4 rubix cube FeatureSolve it by making each side one solid colorVery popular 4x4 for speed cubersExtremely fast with good cornering DescriptionOne of the most popular 4x4,good corner cutting, turns smooth and fast, great for speed cubing, packed in window box.