I tried just selecting 12 individual ones and it showed up to be less than the cost of a pack of 12. and I also tried 16 individuals and they cost MORE than a 16 pack for a BBC. Maybe because BBC is so common? not many people buy rockers for 6's?

Besides, with a 16 pack I have 4 extras.

Should I go with the stamped ones, steel rollers, or aluminum rollers?