Reduce size.The 4mm difference is not only a reduction in size, but also a change in speed compared to the previous generation of Meilong 6. The 4mm reduction in size brings more flexible control, greatly improving the Cube feel. | Magnetic positioning system,easy to gain more speed 144 magnets are placed inside the cube,say no to magnets lose, easy to line up the layers. The cube has a great maneuverability. | Lightweight Structure while making the cube powerful enough, reducing the weight of the cube, making the cube more smooth and stable. | Structural design accessories are integral molding, no cover design, the overall size of the speed cube smaller, lighter, more comfortable sense of weight! | Perfect Gift: Give as a Christmas/Birthday gift to kids, friends and family. Available for personal promotions and competitions