This is a full set of 12 valve stem seals, 6 are white and 6 are black and are of different designs.
This kit is made by Elring Klinger in Germany, the OEM supplier to Mercedes-Benz.
This seal kit is for the 1960 thru 1965 6 cylinder models, and are the early style ad were later replaced by Teflon seals with different valve train parts used.
This kit does include the plastic valve sleeve protectors for installation.