Professional design, it is factory-lubed and easy to turn right out of the box.You can feel its smoothness and good hand feeling The Willking Mastermorphix is a 7-layered morphix puzzle. It features vibrant stickerless colors in the stickerless bright color scheme, it is factory-lubed and easy to turn right out of the box. EASY TURNING & SMOOTH PLAY - Improved anti-pop technology and structure for extremely fast and smooth Cornering,Durable Design MULTI-FACETED DEVELOPMENT - Can foster your kid's sense of space and enhance a child's memory, to release the working pressure of the adults, to help prevent a decline in memory of the elderly. This classic puzzle game will never go out of style and keep your kids off TV / Ipad. Our high challenging 7x7 Mastermorphix cube is suitable for professional players. It is of high difficulty and collection value, It takes patience and skill