【Upgrade Six Light】The combination of three colorful lights and three colorful lights <br>Each wheel is equipped with 2 bearings, 1 magnetic core and 1 mounting wrench tool <br><br>No batteries needed, these are powered by centrifugal force. The faster you go the brighter they get!suitable for double-row skating and skateboarding.<br> <br>Shipping weight: 17 oz <br>Hardness：82A <br>Quantity：4 Wheels <br>Size: 45x 60mm<br><br>Flashing lights: The skateboard wheels flash pink lights \when sliding. The light is bright and not dim, and the faster the speed is, the brighter the lights. Suitable for many occasions, indoor, outdoor, asphalt roads, parks, etc.