This sale if for two each Campagnolo Pista Steel headset fixed (lower) headset cups with bearings. These two are the same, neither is an adjustable cup for the top of the headset. They were from a lot of assorted parts that I am clearing out of my basement.
For information about headset sizes, etc. see the great reference information at the following website:
Sheldon Brown's Bicycle Headset Dimension Crib Sheet
https://sheldonbrown.com/cribsheet-headsets.html
I have numerous other items for sale, including other headsets and headset parts. If you purchase more than one item, I will gladly combine shipping. Note that the Pista headset cups are very slightly smaller in overall diameter than the road cups from that era. They are not interchangeable.