GAN Box v5. Pioneered HSD. It turns well out of the box and would be a good 2x2 for beginners or intermediate solvers alike! GAN251 M. Rated 5.00 out of 5. NOT JUST A TOY - It is widely known that solving cubes is beneficial to memory, inspection and problem solving. The 251 is 2mm larger than the previous GAN 249 creating a more substantial feel and comfortable speedsolving experience. We ship to all countries not sanctioned by the U.S. government. Buy speed cubes from 356 X, Air SM to 249 v2 and other 3x3, 2x2 new arrivals. Not completely satisfied with this product? The first greatest corner-cut cube. /*