Luminous Responsive Yoyo, glow-in-the-dark yoyo balls K1-Plus come with a standard flanging bearing made from ABS material. Ideal for string tricks (1A, 3A, 5A). Durable design with high performance. Charge the noctilucent yoyo by placing it under light or in sunlight for a few minutes to activate the glow effect. Heavier than previous models, providing enhanced playability without the need for weighting rings. A fun and engaging toy suitable for kids, friends, and families. Recommended for daily practice or competitive play. If the string gets stuck: 1. Remove the string first. 2. Check if the ball is loose and ensure both hemispheres are securely tightened. 3. Reattach the string properly. (This step is crucial.) Compatible with moves in categories: 1A, 3A, 5A Weight: 65g Diameter: 51.03mm Ball width: 41.01mm Shaft width: 4.38mm Bearing: 8-ball U-shaped shaft Screw: M4*16mm Color: Blue / Green Material: ABS Package Contents: 1 x Yoyo ball 1 x Pair of gloves 1 x Velvet bag 5 x Ropes (random colors, specific color requests cannot be accommodated) Note: The package includes only the items listed above. Other accessories or products shown are not included. Lighting conditions and display settings may cause slight variations in the color shown in images compared to the actual product. Measurement may vary by +/- 1-3cm due to manual measuring.