Specification Material: Plastic Color: Transparent S-Shape Air Lock Twin Bubble Grommet Homebrew Beer Fermentation Wine Making Application:Pure juice fermentation, such as white wine fermentation, red wine secondary fermentation,preventing back-flush into the fermentation chamber during ambient temperature changes in the room.This style airlock is typically used on fermenters up to 20 Gallon. Fill water into the exhaust valve, insert to the cover of the brew barrel or rubber plug on the top of the fermentation container, cover with the lid. Function:Isolate the air from the wine/beer, discharge CO2, prevent flies flying into the wine/beer After sterilized adding water to the exhaust valve . After both sides of the exhaust valve's water in the parallel state, gently insert the brewing bucket lid. When wine was ferment generated bubbles, through the exhaust valve discharged to buckets outside , All the fermentation process is in normal temperature, automatic fermentation , exhaust, without manual control. Can be used for home-brewed beer, wine, cider and other uses. Size: See the picture Please use boiled water to boil and disinfect the Air Lock before you using it. And clean it with water after using. Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. 1x S-Shape Air Lock with snap-on caps Booze Storage Application:Pure juice fermentation, such as white wine fermentation, red wine secondary fermentation,preventing back-flush into the fermentation chamber during ambient temperature changes in the room.This style airlock is typically used on fermenters up to 20 Gallon. Wine Stoppers Silicone Man Food And Wine Ears Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Glass Bottles with Carbonation Lids Cool Bottle Caps Please use boiled water to boil and disinfect the Air Lock before you using it. And clean it with water after using. Cat Wine Bottle Cover Wine Stopper Holder Metal Color: Transparent Wine Stopper Cork Cat Wine Toppers Stopper All the fermentation process is in normal temperature, automatic fermentation , exhaust, without manual control. Beer Chiller Stick Stainless Steel Beverage Wine Stoppers for Wine Bottles Cute