SET OF TITANIUM BEARINGS with all accessories needed to manage effectively.
Contains: Bearings, 3 different size spacers (8 each), oil, e, steel container used to store all sixteen bearings so dust does not get in bearings when you store.
Detail: steel rings, ceramic balls, nylon cage, single rubber seal, 5 balls.
P.S. the reason you have 3 different size spacers is so you get the perfect fit. The perfect fit is when you wheels can spin like it seems forever when you do your test spin before you put on your skates.
These spacers are very close to the same size but can make a tremendous difference.
When you have different manufacturers for skate frames, wheels and even different models of skate frames, unfortunately your spacers have to be correct size for the optimum roll.