Just half fill with water and you're good to go. Bung Size Base : 26mm.
10 x Fermentation Bubbler Six Chamber Airlocks for Home Brewing Fermenting
6 x Fermentation Bubbler Airlocks & Rubber Bungs Corks Demijohn Wine Beer Cider
3 x Fermentation Bubbler Airlocks & Bored Cork Bungs - Demijohn Wine Beer
Airlock & Rubber Bung x 2 - Fermentation Bubbler Combo for Demijohn Fermenter
Fermentation Bubbler Airlocks and Bored Cork Bungs x 2 Demijohn Wine Beer
Airlock & Rubber Bung - Fermentation Bubbler Combo for Demijohn Fermenter
