Features: 1. This item can emit carbon dioxide for honey, white wine and milk wine alcohol fermentation and can also prevent oxidation. 2. It is easy to operate. You simply need to fill water into the exhaust valve, insert it to the cover of the brew barrel or rubber plug on the top of the fermentation container and then cover it with the lid. 3. It can effectively prevent flies from flying into the wine/beer with a cover included. 4. All of the fermentation process is automatic fermentation without manual control. And it can be repeatedly used for a long time. 5. It is suitable for pure juice fermentation such as white grapes fermentation, honey wine fermentation, red wine secondary ferment. Notice: Please allow 1-3cm deviation due to manual measurement Actual color may be slightly different from the image due to different monitor and light effect Description: Material: Reusable Plastic Size:as shown Package List: 5x Brew Wine Ferment Distiller Tools