Fermentation Aerator Set: The fermentation kit you will get includes 3 plastic fermentation aerators with lids and 3 rubber stoppers. Enough to meet your needs and let you use freely. High-quality material: Our air lock fermentation unit and rubber stopper are made of food-grade silicone and high-quality plastic, safe and non-toxic, a good tool for food fermentation. One-way valve design: The fermentation plug one-way valve is designed to isolate the air well to prevent oxidation during the secondary fermentation process, and to make the entire fermentation process automatic and discharge at room temperature withoutmanual control. Easy to use: Just install a rubber stopper with a hole on the top of the fermentation container, insert the fermentation bubbler into the rubber stopper, then pour water into the bubbler for fermentation, close the lid to start the wine fermentation. Wide Application: This fermentation bubbler has a wide range of applications. Ideal for food preservation, fermenting cabbage, sauerkraut, and brewing wine, beer, mead, etc. Products from NIUNIU's store