Includes - 2x ST Pivot Bearings, 2x Wave Washers, Replacement Procedure Instructions (by email or printed, up to you).These are brand new ordered to Serotta specifications by the OEM manufacturer that made them for Serotta.
They are the upgraded hybrid stainless / ceramic sealed and grease packed bearings that Serotta recommended after their early ST bearings weren't lasting very long.
While these last longer than the originals, Serotta still recommended replacement every 2-3 years.
These are made for the bearing based ST pivot rear triangle - I know that some Ottrotts and legends had these, not sure what other models.
Serotta charged something like $70-100 for a pair of these.
I have many other Serotta parts as well - if you're looking for anything specific let me know.