![Young's Handy Airlocks & Bungs (Pack of 2) - Almost Off Grid](http://www.almostoffgrid.com/cdn/shop/products/7f719176-e27d-4b3c-bc48-fe076f166f61_{width}x.jpg?v=1594093437)
2 x Small Handy Airlock & Bored Rubber Bung Combo for Wine and Beer Making.
Just fill the airlock to ⅓ with cooled boiled water and when fitted with the bored rubber bung protects the ferment by allowing a visual passing of gas pressure to escape but admits no air.