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The hectoliter or hectolitre is a common metric unit of volume. It is equal to 100 liter or 0.1 cubic meters. Plural name is hectoliters.
The ale or beer firkin (from Middle Dutch vierdekijn meaning "fourth") is a quarter of an ale or beer barrel or half a kilderkin. This unit is much smaller than the wine firkin. Casks in this size (themselves called firkins) are the most common container for cask ale.