Pump diaphragm for the Weber DIR 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.
This diaphragm has a cam with, brass, spring-loaded tip.
The total height of the cam + tip is 12.5 mm, measured from the face of the disc.
The diameter of that disc is 22 mm.
Please compare this diaphragm visually and carefully with your old diaphragm as over the course of the years, various different versions were used which are not necessarily interchangeable.
Required quantity per carburettor: 1
This is item number 11 in the drawing.
Weber Part Number: 47407.016