Features: 1. Lightweight and flexible, crafted from 6061 aluminum alloy + eco-friendly ABS plastic, impact and drop resistant, 10 ball bearings for enhanced stability. 2. Consistent sphere design minimizes data tolerance, ensuring stable rotation and extended sleep time. Suitable for 1A/3A/5A tricks. 3. Optimized weight distribution with a V-shaped incline near the central axis reduces friction, allowing for longer spin times. 4. O-ring U-shaped axle with high-precision bearings minimizes functional wear, enabling more advanced tricks. 5. Exquisite craftsmanship using secondary oxidation technology provides superior performance and a premium finish. The spherical design is specifically engineered for challenging top-finger play. Specifications: Material: 6061 Aluminum Alloy + Eco-friendly ABS Plastic Color: Blue, Multicolor, Gold, Purple Diameter: 55.9 mm Width: 42.3 mm Axle Width: 4.59 mm Bearings: 10 Ball Bearings Screw: m4 x 16mm String Length: 105 cm Suitable Tricks: 1A, 3A, 5A Weight: 68 g Package Includes: 1 x Yoyo