Hy glasman, BRGBR is Napa's way of identifying their bearings, I suspect "BRG" is short for bearing, and "BR" is short for bearing, roller. As I told you in an earlier post, the picture of 17888 on the Napa site appears to show the bearing sitting up off of the table, and its thickness measurement is 1.28" if my memory serves me. I have ordered one of each of 17888 cone, and 17830 cup, just to verify that they are the bearings for this application, they will be here in a couple of weeks with my suppliers regular order.
