1. The wheels are made of high-quality materials and feature an ultra-light design to enhance service life and durability, while reducing vibration and wear. 2. The wheel core is encased in fast-rolling, high-resilient PU for stable and smooth riding performance. 3. The wheels are equipped with high-precision ABEC-9 bearings for efficient rolling. 4. Compatible with most freestyle scooters with 110mm pulleys. 5. Ideal for use on wooden floors, carpets, grass, parks, and paved roads. Note: Please verify the size compatibility before purchasing. Material: Aluminum + PU Color: Black Package Contents: 2 x Skateboard wheels (with silver bearings) The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.