This lightweight and flexible aluminum alloy YoYo is shock-resistant and fall-resistant. It features a 10 ball bearing for more stability and is suitable for 1A/3A/5A moves. The V-shaped inclination near the central axis reduces friction, allowing for longer idle time. The high precision bearings in the O-ball U-shaped shaft enable more fancy and action moves. Overall, it's a great educational toy for kids and perfect for competition use. Features: 1. Lightweight and flexible, made of aluminum alloy 6061 + environmentally friendly plastic ABS material, shock-resistant and fall-resistant, 10 ball bearing, more stable. 2. The two spheres are consistent to reduce data tolerance, thus ensuring the stability of the sphere during rotation and prolonging the sleep time. It is suitable for 1A/3A/5A moves. 3. To optimize the weight distribution, the ball arm gradually forms a V-shaped inclination near the central axis, reducing friction and making the ball idle longer. 4. O-ball U-shaped shaft, using high precisions bearings to reduce the functional wear of the yoyo, to achieve more fancy and action. 5. Using the exquisite craft design of secondary oxidation technology, it has superior performances and matches the top finger cover of the PC. It is a spherical shape specially designed to challenge the top finger. Specification: Material: Aluminum Alloy 6061 + Environmentally Friendly Plastic ABS Color: Blue, Multicolor, Gold, Purple Diameter: 55.9mm Width: 42.3mm Axle Width: 4.59mm Bearing: 10 Ball Bearing Screw: m4 x 16mm Rope Length: 105cm Applicable Moves: 1A, 3A, 5A Weight: 68g Package Included: 1 x Yoyo