Enduro Ceramic, XD-15 Corsa, 45 degree Angular Contact, Bearing Bottom Bracket for ITA (Italian) Threaded Framesets running Shimano Hollowtech II crank sets.  

Please note that Italian threaded bottom brackets have different threads than the BSA threaded standard.  Bikes that may have Italian threaded bottom brackets include Colnago and Pinarello.  Compatible crank sets are Shimano and other 24 x 24mm spindles. 

XD-15 bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride Grade 3 ceramic balls in a proprietary process that results in the ultimate high performance bearing setup.

The most impressive feature of these bearings is, unlike other bearings, they only get better with use. As the bearings wear-in, the balls actually make the races even smoother. So when compared to other ceramic-hybrid bearings on the market that claim speed and power advantages on day one, Enduro XD-15 bearings not only provide the same initial advantages on day one, but will get even faster and smoother with time and use, while the other ceramic-hybrid options will only get slower.