Aluminum alloy material, and flexible, with more stable shock resistance and drop resistance The two spheres are consistent, reducing data tolerance, thereby ensuring stability during the rotation process of the spheres and extending . The 1A/3A/5A technique is suitable The ball arm gradually forms a V-shaped tilt near the center to reduce friction, making the ball idle for longer The 10 bead U-shaped shaft adopts high-precision bearings to reduce the functional wear of the yoyo ball and achieve more tricks and movements Diameter: 55.9mm Width: 42.3mm Shaft width: 4.59mm Bearings: high-precision 10 ball bearings Recycling sticker: yellow silicone treatment: bright Screw specification: x 10mm Material: aluminium alloy colour: Black+Red+Silver Package Contents: 1 x yo yo 10 x cord(Note: Randomly colored. Cannot be chosen the specific color.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.