This 3-piece airlock is perfect for homebrewers who ferment in carboys or buckets. When you're brewing at home, it helps to control the fermentation process by allowing CO2 to escape while preventing oxygen and contaminants from entering. The airlock can be taken apart for easy cleaning and has multiple holes for smooth CO2 release. It's a great choice for both beginner and experienced homebrewers looking for a reliable and easy-to-use airlock.