Twin bubble airlock, 1 quantity, is a standard sized airlock that ensures that CO2 is able to escape through bubbling out through water in the airlock while ensuring that oxygen and other contaminants are unable to spoil your next batch of beer, mead, or wine. This airlock fits ...Twin bubble airlock, 1 quantity, is a standard sized airlock that ensures that CO2 is able to escape through bubbling out through water in the airlock while ensuring that oxygen and other contaminants are unable to spoil your next batch of beer, mead, or wine. This airlock fits all standard sized holes drilled in bungs and caps.
This airlock is good for batches of all sizes, most commonly used in between 1 and 6 gallon batches.