Description: Pack of 4 pieces skateboard wheel rollers made of wear-resistant and solid PU material providing super grip and stability. The wheels are fitted with a built in generator magnet which makes the wheel light up when rolled. As you cruise, these LED wheels light up and cause the exterior color to glow magnificently. These versatile skating wheels roll smooth to help improve the comfort and speed of your ride. Skateboard Wheel size: 58mm diameter x 32mm width; Durometer count: 80A. wheels are comfortable and durable, the light is bright and not dim.Suitable for many occasions, indoor, outdoor, asphalt roads, parks. Specification: Material: PU Size Chart: 58x32mm/2.28x1.26inch Package Includes: 4 Pieces Roller Skate Wheels 4 Pieces Magnetic Core Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping!