This exra large 3-piece airlock is just as reliable, easy to fill, and easy to clean as the standard size, but with a 50% larger capacity to hold more water or sanitizer. For use during fermentation to allow gas to escape from your homebrew, but prevent outside air from getting in. Use with carboys or buckets.
(Although most home brewers prefer the 3-piece airlock, we do sell the triple ripple type (16599) in case you are used to that type and would like to stay with it.)
Please Note: Stopper Not Included.