Qm-h Set of 5 Pieces 1x3x3 2x2x2 3x3x3 4x4x4 5x5x5 Stickerless Speed Magic Cube Puzzle Classical Cube Black Set of 5 pieces cubes sticker rubiks,instruction include. For kids, it can develop their brain and logic thinking ability. For adults, it can release their pressure after work. New structure design is drop-resistant and water-resistant. Eco-friendly, recyclable material product, harmless to human and environment.