Check the archives under "campagnolo bearings" there are lots of previous discussions on this topic.
Grant McLean Toronto.Ca
Andy Antipas asked: Time to do some winter bicycle servicing. I noticed Bicycle Classics lists loose ball bearing as grade 25 and the same quality as Campy. I have seen other suppliers list grade 200 bearings. How are bearings graded? Is a higher or lower number the better grade? Thanks for the help!