Magic Combination 3d Gear Cube I Generation Black Painted Stickerless Twisty Puzzle by Brainiac Excellent suggestion from a trusted brand Brainiac Great corner cutting ,tension adjustable. Size 5.7cm5.7cm5.7cm. 3D gear is designed Art beats nature. Rubik's Cube Rubik's cube designer, 26 blocks of the cube is a gear, meshing This product contains small parts, children below 8 years old needtheir parents to play with them, so as to avoid suffocation Unlike ordinary 333 cube, with four water chestnut as the center fixing the whole cube