Centric VS Raybestos?

I just bought new wheel cylinders and M/C from rockauto.

All Raybestos brand.

They are all made in china.

I've not installed them yet, but don't see any glaring issues.

I've found that the quality of chinese manufactured goods is HUGELY dependent on the involvement and QC enforcment of the company hiring out the factory.
If the company in control has good practices, the parts are fine.