Features:Hardne 82A: Give you long-lasting grip whether on a rink, sidewalk, or street.High Performance: Smooth, comfortable, and durable, allowing you to find more fun.Applicable Usage: Suitable for double-row skating and skateboarding, rollerskates.Material: Made of PU and PP material, durable, the light is bright and not dim.Occasions: Suitable for many occasions, indoor, outdoor, asphalt roads, parks.TIPS: The bearing needs to be preed tightly for the product to emit light, otherwise it will not emit light.Specifications:Material: PU+PPColor: Colorful, White, Blue, Red, Pink+PurpleSize: About 5.8x3.2 cm/2.28x1.26 inches(Diameter*Width)Bearing: high speed 608RSKernel: LED lightHardne: 82 AApplication: Double roller skating, skateboardResilience: 80%Package Included:4 xLuminous Skateboard WheelsNote:1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.