Description These airlocks for fermentation provide an air-tight seal to prolong and preserve opened bottles of wine. Designed to keep air out of bottle and slowing oxidation rates, keeping wine fresh. Airlocks can be used for a variety of purposes - to preserve foods (sauerkraut, pickles) or create delicious wine and beer. Feature - Color: As shown. - Material: Plastic. - Size: About 11.5 x 4 x 4cm. - Made of premium material, safe, durable, easy to use and easy to clean. - The whole fermentation process is automatic fermentation and exhaust at normal temperature, without manual control. - Airlocks allow gas bubbles to escape during the fermentation process while preventing oxygen from ruining your ferments and brewing activities. - Easy to use, simple operation, and can be reused for a long time. - Suitable for pure juice fermentation, such as white grapes, mead fermentation, secondary fermentation of red wine, etc.Package list: 3 x Airlock