100% Band and high quality Smooth Sliding:Using 608RS high-speed rotating bearing,sliding without noise, smooth and fast rotating speed to help improve the comfort of your ride. 82A Hardness Wheels: Luminous skating wheels made of high-quality PU material with 82A hardness,4-wheel PU shock absorption and wear-resistant,providing balance of grip and softness,has excellent durability. Applicable to Many Occasions: skate wheels suitable for double row skating and skateboard,with nice performance of sliding,perform well on indoor,outdoor,asphalt roads,parks. High Wear-resistant and excellent durability Bearing: High-speed 608RS Application: Double-row pulley/skateboard Hardness: 82A Single pulley weight: 0.1KG Colour: black Material: PU+PP Size: 58 x 32mm Package Contents: 8 x pulleys 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.