High resilient PU infusion processing material, durable and wear-resistant.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 hardnessColour: BlueMaterial: PUSize: 60 x 45mmPackage Contents:4 x Skateboard Wheels(with bearings)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.