TorqTite, Ceramic, XD-15 Corsa, 45 degree Angular Contact, Bearing Bottom Bracket for BBRight Framesets running Shimano Hollowtech II crank sets.  

Please see the accompanying pics that will illustrate the bottom bracket standard and compatible crank set.  

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.