Airlock - Vintage (Twin Bubble S Type)

One piece S-shaped airlock that features a smaller chamber so you can closely observe the CO2 rising and with that, the rate of fermentation. Fill the airlock with water and insert into a drilled stopper to vent gases during fermentation.
 
Also handy when you are cooling a beer as there is less of a chance of getting water sucked back into the fermenter. Innovative S design prevents backflow.
 
Height - 190 mm (7")
Wide - 52 mm (2 1/8")