Just half fill with water and you're good to go. Bung Size Base : 26mm. Final Product: Equipment Type: Airlock & Bored Rubber Bung Brand: Almost Off Grid Country/Region of Manufacture: United Kingdom EAN: 5055926747152
4 x Fermentation Bubbler Airlocks & Bored Rubber Bungs Corks Demijohn Wine Beer
2 x Fermentation Bubbler Airlocks & Bored Cork Bungs - Demijohn Wine Beer
3 x Fermentation Bubbler Airlocks & Bored Cork Bungs - Demijohn Wine Beer
5 x Fermentation Bubbler Airlocks & Bored Cork Bungs Demijohn Homebrew Wine Beer
6 x Fermentation Bubbler Airlocks & Bored Cork Bungs Demijohn Wine Beer Cider
2 x Fermentation Bubbler Airlocks Bored Cork Bungs
