Aluminum alloy material, light and flexible, shock-resistant and more stableThe two spheres are , reducing data tolerance, thus ensuring the stability of the sphere during rotation, prolonging the , and suitable for 1A/3A/5A moves.The ball arm gradually forms a Vinclination near the central axis, which reduces friction and makes the ball idle .The 10-ball U-shaped shaft adopts high-precision bearings to reduce the functional wear and tear of the yo-yo, and realize more fancy and action.Adopt secondary oxidation technology, exquisite process design, superior performance, matching PC top finger cover is a spherical shape specially challenging the top finger.size: Diameter 57mmMaterial: alloycolour: blackNote: Random color, 't accept the specified color.Package Contents:1 x Ball3 x Rope (random color)1 x Glove2 x recycling stickers1 x Bearing (random 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.