Good-Quality Materials: This luminous double-row wheel is made of durable PU rubber, hardness 82A, the wheel is comfortable and durable, the light is bright and not dim.^Smooth Ride For Optimal Skating: This multifunctional skating wheels roll smoothly and is poured with high rebound for easy riding and helps improve riding comfort.^Match Roller Skates: Packed in groups of 4, the package contains 4 luminous roller skate wheels, 2 bearings, 1 magnetic core and 1 installation wrench, fully equipped.^Detailed Design: Built-in magnetic core rotation power generation, no additional power supply, you can slide faster to make the flash brighter. Easy to install and durable.^Applicable Occasions: These good performance skate wheels reduce friction and maximize speed on various types of surfaces. Suitable for indoor skating rink, highway, asphalt road, park.^