A cask that holds a quarter of a barrel, which is 10.8 US gallons or 9 Imperial gallons.

A barrel-shaped container used for the production, storage, and service of cask-conditioned beer

A long-neck spout fitted to a cask beer engine featuring a tall arch resembling the long, curved neck of a swan.

A beer brewed from traditional ingredients, matured by secondary fermentation in the container from which it is dispensed, and served without the use of carbon dioxide.