Breathable Silicone Stopper/Airlock

Breathable Silicone Stopper/Airlock
Never worry about checking the water in your airlock again with this breathable silicone stopper that acts as both a stopper and an airlock for glass carboys. The unique design allows CO2 pressure to escape but keeps oxygen and airborne contaminants out. A great choice for bulk ageing beer or wine.
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