Chrome strainer plug without pin

This chrome kitchen strainer plug will fit a range of kitchen sinks.

There are two main types.

The one shown here is 80mm diameter and has a rubber washer on the back which is approximately 10mm thick with 6 rubber "spikes" and does not have a metal pin underneath.

The other strainer plug shown separately, has a thin rubber washer and a metal pin that is 30mm long with a sprung ball bearing.