3x3 Smooth Speed Cube (Black) Enjoy easy turning and smoothly play GranVela's cube, for extremely fast and smooth cornering. Eco-friendly Product- Recyclable Material, Harmless to Human and Environment. Stickers on surface, bright in color. Classic toy for both kids and adults. Great for pros: Reduce your personal record time with effortless, single-finger turns, slick cornering and reverse cornering, and pop-resistant pieces. Fully-adjustable tension settings to increase precision or speed, perfectly lubricated and fast out of the box.