?Package Included?-- Pack of 8 wheels replacements. ?Highlights?-- These softer wheels are better for outdoors because they have more "give" to allow you to bounce or roll over small sticks, cracks, and rocks. Also a decent options for beginner skaters on slick/hard surfaces because the soft wheel makes the skater fairly slow and steady. ?82A Hardness for Outdoor Performance?-- With 82A hardness, providing balance of grip and softness, these wheels are soft enough that you don't feel every bump, but roll as smoothly as any other hybrid wheel, great to skate on hard or rough outdoor surfaces. ?Size & Diameter?-- 58mm in diameter, 32mm in width, equipped with ABEC 9 bearings and spacer, the inner diameter of bearing is 8mm, outer diameter of bearing is 22mm, please ensure if it is the specifications you need before purchg. Bearings and spacers are already installed on the wheel. ?Premium Material?-- Made from durable polyurethane material, designed to provide good grip and speed in all hardnesses and has excellent durability.