Left and right bottom bracket cups with standard bearings for FSA MegaExo cranks. BB-8681 for K-Force Light (a non-ceramic option) and SLK Light Road MegaExo cranks (BB-8681 the bearing covers have been redesigned so that the spindle now rides directly on the bearing itself). BB-8000 for FSA K-Force and SLK Road MegaExo cranks . BB-9000 is for 24mm spindle MTB K-force, Team Issue and 68/73mm Gravity Lite cranks. BB-7000 is for 24mm spindle/83mm shell MTB Gravity Lite cranks. BB-1000 is for 19mm spindle MTB Gamma and Omega Drive cranks. 1.37" x 24tpi (English threads) or M36 x 24tpi (Italian threads). Features: Compatible with the "Arc-Spline" spindle equipped Team Issue, Neo-Pro, SL-K Light, K-Force Light cranksets ONLY