[Quality Material]-- Made of polyurethane material, designed to provide good grip and speed in all hardness with excellent durability. [Size and Diameter]-- 58mm diameter, 32mm width, equipped with ABEC 9 bearing and spacer, bearing inner diameter is 8mm, bearing outer diameter is 22mm, please check if it meets your required specification before purchase. The bearings and spacers are already installed on the wheels. [82A Outdoor Performance Hardness] -- These wheels have 82A hardness, providing a balance of grip and softness, soft enough that you 't feel every bump, but roll as smoothly as any other hybrid wheel, perfect for on hard or rough outdoor surfaces. [] - These softer wheels are better suited for outdoor activities because they have more "give" and allow you to bounce or small sticks, cracks and rocks. They are also a good choice for beginners on smooth/hard surfaces as the softer wheels make the quite slow and steady. Color: Pink Material: pu Package Contents: 4 x Skating shoe wheel 1 x Wrenches 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.