Features: Bearings make by carburising bearing,can used in most types of weather, also dust and dirt proof. Street wheel have a wide contact with ground and have a strong ability to pass obstacle. Skateboards wheels have a good rebounds, make them faster & more stable in grip, givings good control. Used for the modification of indoor and outdoor sports enthusiasts' Skateboards and longboards / the maintenance and replacement of accessorys. Suitable for parks, street skateboarding, asphalts road, and other place. Specifications: Material: PU Color: Redness/Yellow/Green/Blue/Oranges Size: about 70x51mm/2.75x2.01inch Hardness: 78A Resilience: 75% Package Includes: 1set Roller Skating Skateboards Wheel note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.