29x42 mm, for SRUM DUB axle. This kit should work for any bottom bracket that has 42mm OD bearings, including BB30, BB30A, PF30, PF30A, BBRight, and BB386.

30x42x7 mm The most common use for this bearing is as a direct replacement bearing for BB30, PF30 and BB386 and most other bottom brackets with a 30mm OD spindle.

30x42x7 mm, bottom bracket bearing, 30 mm spindle, BB30, PF30,B386

29x42x7 mm The most common use for this bearing is as a direct replacement bearing for BB30 and PF30 type BBs with SRAM DUB 29 mm axle cranksets.