Newisland Speed Cube 4x4x4 Puzzles Cube, Smooth Durable Magic Cube with Vivid Color (4x4s) ENHANCED SPEED CUBE: Combines high performance designs with good values. Highly recommended 4x4 cube set. SUPER SMOOTH PALY: Updated structure designed for easier turning, speed cubing and tension adjusting. Improved anti-pop technology allows super fast turning. HIGH QUALITY MATERIALS: Solid vivid color stickers for durable use. Eco-friendly original ABS, non-toxic and harmless to people and environment. INTELLIGENCE DEVELOPMENT: Foster kids' concentration and enhance children's memory. Perfect toys for kids and adults. IN THE BOX: Newisland Speed Cube 4X4, solution card, replacement stickers, customized rubik cube bag and worry-free customer services.