In looking at these on NAPA's website, there seems to be two different versions of each of the bearings available, at different price points.
One is a 'Proformer' bearing, and the other a 'NAPA' bearing, which at least in the picture, says "Made in USA". The NAPA branded ones are also more expensive.
I was also curious, based on the application notes on NAPA's site for these. Both say "w/ 11" Brakes;w/ 10" Brakes". Is it safe to assume that the Kelsey Hayes disk cars use the same inner & outer bearings & seals as the 10" drum brakes? If you see an application note that says "11" brakes", would that be an indicator of the disk brake application?