Description: Made of high quality Polyurethane(PU) and core is Polycarbonate(PC), non-skid, wear-resistant, and good pressure resistance. 58mm in diameter, 32mm in width, equipped with 608RS bearings and spacer. With 82A hardness, resilience 80%, providing balance of grip and softness, great to skate on hard or rough outdoor surfaces. Excellent performance, reduce noise and friction, can give your a fast, smooth ride. Fit for skateboard wheels, longboard wheels, roller skates wheels, scooter wheels, inline skate wheels, caster wheels etc. Package Includes: 4 Pieces Skate Bearings Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!