Strap in, because these bearings by Cortina Bearing Co are pre-lubricated for a smooth, fast ride. We offer the standard size (608 with an 8mm core, 22mm outer diameter, and 7mm width) and each set of Cortina Bearing Co Na-Kel Smith Playboy Skateboard Bearings contains eight (8) bearings, which is enough for four (4) wheels. Includes: One (1) set of eight (8) Cortina Bearing Co Na-Kel Smith Playboy Skateboard Bearings from Cortina Bearing Co.