1.Color: Blue; Material: PU; Hardness: 78A; Bearing Size: 22 x 8mm / 0.87 x 0.31 inch(ODID); Wheel Size: 70 x 51mm / 2.76 x 2.01 inch(ODW); Package List: 4 x Longboard Wheels and Bearings Set 2.Advantage: The wheels and bearings are mounted together, reducing your installation time. Street wheel has a wide surface with the ground and has a strong ability to pass obstacles. Skateboard accessories can smoothly pass through various roads. Skateboard wheels have a good rebound, making them faster and more stable in grip, giving you good control for mobility. The Skateboard hardware tool is suitable for park or street skateboarding, asphalt roads, and other places. 3.Instruction: 1. Install the assembled wheel on the skateboard bridge according to 'spacer+wheel+spacer+side nut'. 2. Use a tool to twist the side nut until it is flush with the skateboard bridge 4.Application: Skateboard hardware sets are used for the modification of indoor and outdoor sports enthusiasts' skateboard and longboard or the maintenance and replacement of accessories.