The two spheres are consistent, reducing data tolerance and ensuring stability during rotation, which helps extend spin time and supports 1A, 3A, and 5A play styles. The unique 10-ball U-shaped axle features high-precision bearings that minimize wear and enable more advanced tricks and performance. Crafted with secondary oxidation technology and a refined manufacturing process, this yo-yo delivers reliable performance. The PC top cap has a spherical design optimized for top mount tricks. Diameter: 55.9mm Width: 42.3mm Axle Width: 4.59mm Bearing: High precision 10-ball bearing Response System: Silicone pads Surface Finish: Bright finish Screw Specification: M4 x 16mm Material: Aluminum Alloy + ABS Package Includes: 1 x Yo-Yo Note: Light reflection and display settings may cause slight color variations between the product and the image. Measurement may vary by +/- 1-3cm.