[Good airtightness] The good airtightness of the fermentation airlock makes fermentation easier, effectively isolates the air and prevents oxidation. Automatic exhaust at room temperature without manual control Crafted from , food-grade materials,these airlocks not only allow you to monitor the entire fermentation process easily but also and safety in food preservation. [Versatile Fermentation Uses]Our airlock set is perfect for a wide range of fermentation projects. Whether you're making craft beer, wine, sauerkraut, , cider, or various fruit and rice wines, this set provides the necessary tools to your home brewing and fermenting journey with ease. [Enhanced Airtightness for Optimal Fermentation]Achieve better fermentation results with our airlock set that offers superior airtightness. It effectively isolates your brew from external air, preventing oxidation, and allows for automatic exhaust at room temperature, eliminating the need for manual intervention.