Accepting no Further Rats
From Fallen London Wiki
The pipe is closed.
This item has only ever been shown off by a Developer, and has never been obtainable in-game.
It shows up in the Hat slot of your inventory.
See here for a list of pages which require this item, or click to show them.
Wiki note: This was a developer quality given to Alexis Kennedy before he left Failbetter Games. The item was previously visible on his profile page, which is no longer accessible.