They are no longer made by MBS. I believe the MBS bearings are superior to the chinese roller bearings. My 59 gmc 1/2 ton went through 2 complete sets of the chinese bearings. The bearings ended up destroying my spindles forcing me to find a new front axle.
Inner seal: National #6064
Inner bearing and race: MBS #909052R
Outer race: Timken #LM11919
Outer bearing: Timken #LM11949
