Moto Deluxe Bearings are built to the highest specifications and constructed from the best parts available. These bearings are tested and skate rated, meaning that they will withstand the roughness skating brings. Like all Moto Bearings these are pre-spun to ensure there is no funky break-in period. These bearings are made with high precision races, hardened steel balls, delrin retainers, and a light lubrication for a smooth and fast roll. These are sold in 16 packs.