Features1[Durable Without Cracking] Made of durable PU material, which provides a durable use experience and will not crack easily 2[Balanced Riding] 78A hardness, providing a balance of grip and softness, suitable for most skateboarders, especially beginners 3[Strong Grip] Has a grip edge that helps downhill and better helps you do street skills 4[Wide Application Range] Suitable for parks, streets, slopes, technical slides. It is not recommended to use it on uneven ground 5[Safe Riding] Stable and quiet, it can slide quickly and smoothly to help you ride safelySpecificationItem Type:Scooter WheelsMaterial: PUProduct Size: Approx. 70 x 51mm / 2.8 x 2inHardness: HR-78ARebound: 70%Package List4 xScooter Wheels