Aluminum alloy material, lightweight and flexible, with more stable shock resistance and drop resistance, using aluminum alloy 6061 material 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 axis to reduce friction, making the ball idle for 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 Superior performance, matched with a PC top finger cover, is a spherical shape specifically designed to challenge the top finger Diameter: 55mm Width: 42mm Shaft width: 4.59mm Bearings: high-precision 10 Recycling sticker: yellow silicone Surface treatment: bright surface Screw specification: * 10mm Colour:black+purple Material:aluminum alloy Package Contents: 1 set x yo yo 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.