Ahyuan Shengshou 5x5x5 Speed Magic Cube 5x5x5 Speed Magic Cube. Improve your memory and hand flexibility. 5 by 5 cube It's a true speed-cube - very slick and fast out of the box. Very smooth out of the box,Extremely fast with excellent cornering. Perfect for testing your mental skills and challenging your patience. Rotate the magic cube with your friends and enjoy the happiness.