These brand new, professional grade Skate Rated bearings by Modus Bearings are pre-lubricated for a smooth, fast ride. They come in the standard size (608 with an 8mm core, 22mm outer diameter, and 7mm width) and provide the best for performance and durability. Each set of Modus Bearings 8mm Skate Rated Skateboard Bearings contains eight (8) bearings, which is enough for four (4) wheels.