High resilient PU infusion processing material, and wear- Polyurethane wheels with ABCE - 9 bearing for smooth riding and high durability standard cruiser wheel size, fit for most of the skateboard Include 4 wheel hubs, make the wheel and holder connect closer and decrease the friction Colorful and cool appearance, make you attractive among the skateboarders Hardness: 83A neutral hardness colour: black + red Material: PU + bearings size: 60x45mm Package Contents: 4*Skateboard Wheels 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.