16 skate bearings are Deep Groove Oil Preserved Radial Ball Bearings with NYLON Retainer,The Nylon material has low friction and less weight, less friction & less weight means higher speeds. Made from high-strength chrome steel for durability and performance, also bearings are pre-lubricated with Oil.
608 Ball Bearings
Deep groove ball bearings
Retainer: NYLON (Less friction & less weight=Higher speeds)
