Original "Effbe" impregnated (rubberized) textile diaphragm "leafs" for the pump mechanism on the Solex WNHEO carburetors.
These diaphragms now tend to suffer from age and the ravages of aggressive modern fuels which causes the "rubberized textile" material to harden and even crack, causing erratic running of the engine and fuel leaks.
Replacing the diaphragm is then the only sensible option.
Each set consists of 2 leaves.
Required number of sets per carburetor: 2
Required number per carburettor: 1