Leather washer for older pumps - not suitable for vegans.
If it is just the leather washer that has gone, then you can replace this. However the main reason that the washer does not work is that it has dried out. Try softening it with some Pump Cup Oil - this usually works.
This item is no longer made - however the Rubber Duraseal Pump Cup Washer will also fit.
Part Number: 418212 No longer made.