NICE Double Metal Shielded Ball Bearing 1621DS [Lot of 4] NOS
A nice touch is that the model 607-ZZ fits small assemblies without any fuss.
NICE Double Metal Shielded Ball Bearing 1621DS [Lot of 3] NOS
A nice touch is that model 608DD is easy to reference when you revisit the listing “What stands out about model 608DD is how it lines up with the dimensions I expect.