Silicone Vented Bung for barrel or demijohn

Silicone is highly stable making for a long lasting bung. You don`t have to worry about cracking, chafing mold or mildew; they are are perfect for winemaking, brewing and even spirits. 

Vented Bung - This vented stopper fits both barrels and our demijohns and act as both a stopper and an airlock. Its five vents and pliable seal allow CO2 to escape but prevents entry of oxygen and airborne contaiminants. No more suckback of liquid from the airlock; great for extended fermentations where CO2 production is minimal.

Bottom diameter: 1 3/4 in.

Top diameter: 2 1/4 in. 

Overall Height: 2 1/8 in.