High resilient PU infusion processing material, durable and wear-resistant. Polyurethane wheels with ABCE - 9 bearing for and high durability. standard cruiser wheel size, fit for most of the skateboard. Include 4 wheel , 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 color: Blue Material: PU Size: 60 x 45mm Package Contents: 4 x Skateboard Wheels(with bearings) 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.