Shock- and drop-proof, more stable using aluminum alloy 6061 material + environmentally friendly plastic ABS material. The two spheres are consistent, reducing the data tolerance to the stability of the sphere during rotation and prolonging the . It is suitable for 1A/3A/5A moves. The ball arm gradually forms a V shape near the center , and the tilt reduces friction, which makes the ball idling for a longer time. The 10-ball U-shaped shaft adopts high-precision bearings to reduce the functional wear of the yo-yo to achieve more fancy and action. Using secondary oxidation technology, exquisite craftsmanship, superior design performance, matching PC top finger cover is a spherical shape that specifically challenges the top finger. Name: Proud Dragon Soul Spherical: butterfly Weight: 68g/set Diameter: 56mm Width: 42.8mm Shaft width: 4.59mm Bearing: High-precision 10-ball bearing Applicable moves: (1A, 3A, 5A) Colour: blue and black Material: aluminum alloy + ABS Package Contents: 2 * yo-yo 20 * rope (random color, don't accept the specified 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.