[Reliable material]This luminous double-row skate wheel is made of durable and long-lasting PU with 78A&82A 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 & DURABLE BEARING]Using 608RS high-speed rotating bearing, sliding without noise, smooth and fast rotating speed, and more durable. [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] colorful and dazzling. The lights automatically when the wheels are spinning. So the faster you skating the brighter they get! Colour:Blue light Material:PU Size:58 x 32mm Package Contents: 8 * skateboard wheel 16 * bearing 8 * wheel core 1 * wrench Only the above package content, other products are not included. Note: Light 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.