The set includes everything you need for a thrilling skating experience. Esigned to provide good grip and speed in all hardnesses and has excellent durability. - The inner and outer edges of the hub are oversized, which reduces the amount of urethane on the edges of the wheel. This makes it easy to perform stops and offers excellent response. Size And Diameter - 58mm/2.28 in diameter, 32mm/1.26inch in width, equipped with bearings and spacer. Enhance your roller skating experience. Type:Roller Skates Wheel Device:Bearing Colour:Black Material:PU Size:5.8x5.8x3.2cm Package Contents: 8 * wheels 1 * wrench 2 * brake head 2 * screw 1 * screwdriver 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.