Dannemann Black Cube Puzzle Bundle Pack,2x2x2,3x3x3,4x4x4,5x5x5 Set,Speed Cube Collection,4 Packs Practice your brain and improve your memory and perfect for testing your mental skill and patience Color: Black body Material: ABS + PVC Sticker Smooth, Highly recommended cube set Set of 4 pieces2x2x2,3x3x3,4x4x4,5x5x5