[Reliable material]This luminous double-row skate wheel is made of and long-lasting PU with 78A hardness, which provides nice performance of sliding; The skate wheel performs well on interior surfaces of wood, concrete and sports tiles, giving you a lasting grip [Sturdy & bearing]Using 608RS high-speed rotating bearing, sliding without noise, smooth and fast rotating speed, and more . [Designed to ] Designed with an exclusive anti-stick compound reduce friction that gives a fast/consistent, smooth slide all the way through. [Light up your skate up] colorful and dazzling. The lights automatically when the wheels are . So the faster you skating the brighter they get! Material: PU colour: green Package Contents: 8 x 6 LED luminous roller skate wheels 16 x 608 bearings 1 x roller skate wheel core Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.