Ceramic BB90 units, for all popular 24mm axle cranksets, these are 100% interchangeable with all Shimano systems, which carry the HTII description, also known as hollowtech 2.

The bearings we fit are the very best performance, dry lube, or hybrid units, which are lighter, and perform in all extreme conditions, without, or minimal lubrication, this lack of lubrication, enhances the performance, giving noticeable improvements, in the effort needed to turn the crankset. 

Your purchase is for one pair of  bearings

Used by professional athletes, and amateurs alike.