Modus Skate Bearings 8mm Ceramic Skateboard BearingsStrap in, because these Ceramic bearings by Modus are pre-lubricated for a smooth, fast ride. Warehouse Skateboards offers the standard size (608 with an 8mm core, 22mm outer diameter, and 7mm width) and each set of Modus Skate Bearings 8mm Ceramic Skateboard Bearings contains eight (8) bearings, which is enough for four (4) wheels.Features:  One (1) set of eight (8) Modus Skate Bearings 8mm Ceramic Skateboard Bearings from Modus Rating: Ceramic Industry standard size: 608 with a 8mm core, 22mm outer diameter, and 7mm width Pre-lubricated for a smooth, fast ride 100% guaranteed authentic